Tension builds in Yemen

Anit-government protestors reach to catch a youth, after throwing him in to the air while celebrating President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Monday, June 6, 2011. A cease-fire in Yemen's capital was at risk of unraveling Monday as regime supporters opened fire on opposition fighters in renewed clashes that killed at least six. The violence raises fears over the potentially explosive situation after the wounded President Ali Abdullah Saleh left the country, creating a deep power vacuum.

Yemeni children and female anti-government protestors celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Monday, June 6, 2011. A cease-fire in Yemen's capital was at risk of unraveling Monday as regime supporters opened fire on opposition fighters in renewed clashes that killed at least six. The violence raises fears over the potentially explosive situation after the wounded President Ali Abdullah Saleh left the country, creating a deep power vacuum.

Armed tribesmen stand guard outside the building of the ministry of electricity in Taiz, Yemen, Monday, June 6, 2011. A cease-fire in Yemen's capital was at risk of unraveling Monday as regime supporters opened fire on opposition fighters in renewed clashes that killed at least six. The violence raises fears over the potentially explosive situation after the wounded President Ali Abdullah Saleh left the country, creating a deep power vacuum.

A defected army soldier checks a car at a checkpoint in Sanaa, Yemen, Monday, June 6, 2011. Violence threatened Yemen's capital with a return to chaos Monday with at least six opposition forces reported killed after a day of jubilation had gripped Sanaa with the departure of President Ali Abdullah Saleh, who underwent surgery in Saudi Arabia for wounds he suffered in a rocket attack on his compound.

Armed tribesmen, loyal to Sheik Sadeq al-Ahmar, the head of the powerful Hashid tribe, stand guard in a street around al-Ahmar's house, during clashes with Yemeni security forces in Sanaa, Yemen, Monday, June 6, 2011. Violence threatened Yemen's capital with a return to chaos Monday with a small number of opposition and overnment forces killed _ after a day of jubilation had gripped Sanaa with the departure of President Ali Abdullah Saleh, who underwent surgery in Saudi Arabia for wounds he suffered in a rocket attack on his compound.

A Yemeni army officer lifted by anti-government protestors, chants slogans as he and others celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Protesters danced, sang and slaughtered cows in the central square of Yemen's capital Sunday to celebrate the departure of the country's authoritarian leader for medical treatment in Saudi Arabia after he was wounded in a rocket attack on his compound.

Armed tribesmen, loyal to Sheik Sadeq al-Ahmar, the head of the powerful Hashid tribe, stand guard in a street corner around al-Ahmar's house, during clashes with Yemeni security forces in Sanaa, Yemen, Monday, June 6, 2011. Violence threatened Yemen's capital with a return to chaos Monday with a small number of opposition and overnment forces killed after a day of jubilation had gripped Sanaa with the departure of President Ali Abdullah Saleh, who underwent surgery in Saudi Arabia for wounds he suffered in a rocket attack on his compound.

A female anti-government protestor sprays foam while celebrating with other protestors President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. The departure of Yemen's battle-wounded president for treatment in Saudi Arabia set off wild street celebrations Sunday in the capital, where crowds danced, sang and slaughtered cows in hopes that this spelled a victorious end to a more than three-month campaign to push their leader from power. Placard reads in Arabic, "Congratulations to the Yemeni people".

An armed tribesman, loyal to Sheik Sadeq al-Ahmar, the head of the powerful Hashid tribe, looks on while patroling a street around al-Ahmar's house, during clashes with Yemeni security forces in Sanaa, Yemen, Monday, June 6, 2011. Violence threatened Yemen's capital with a return to chaos Monday with a small number of opposition and overnment forces killed, after a day of jubilation had gripped Sanaa with the departure of President Ali Abdullah Saleh, who underwent surgery in Saudi Arabia for wounds he suffered in a rocket attack on his compound.

In this photo taken Friday, April 29, 2011, Yemeni President Ali Abdullah Saleh, center, waves to his supporters during a rally in Sanaa, Yemen. Saleh, who was taken to a military hospital in the Saudi capital, Riyadh, underwent successful surgery on his chest to remove jagged pieces of wood that splintered from a mosque pulpit when his compound was hit by rockets on Friday, said medical officials and a Yemeni diplomat.

A Yemeni tribesman holds up his rifle while shouting slogans with anti-government protestors, as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Taiz, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

An anti-government protestor is thrown in to the air by others while celebrating President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

Anti-government protestors dance and sing as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

Anti-government protestors reach their hands to catch a protestor after throwing him in to the air as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

An anti-government protestor, his face painted with the colours of his national flag, shouts slogans while celebrating with others following President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound. Arabic reads on his body, " Careless Ali".

Yemeni army soldiers lifted by anti-government protestors, chant slogans and hold up their rifles as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

A Yemeni army soldier, center, lifted by anti-government protestors, holds up his rifle as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

A Yemeni army soldier celebrates with anti-government protestors following President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

Anti-government protestors celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

A Yemeni army soldier, center, lifted by anti-government protestors, reacts holding up his national flag with Arabic reads on it, " A thousand congratulations", as he and other demonstrators celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

Yemeni army soldiers lifted by anti-government protestors, react as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

Yemeni army officers lifted by anti-government protestors, hold up their rifles while being sprayed with foam as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.

Yemeni army soldiers lifted by anti-government protestors, chants slogans and wave their national flag as they celebrate President Ali Abdullah Saleh's departure to Saudi Arabia, in Sanaa, Yemen, Sunday, June 5, 2011. Thousands of protesters are dancing and singing in the Yemeni capital Sanaa after the country's authoritarian leader flew to Saudi Arabia to receive medical treatment for wounds he suffered in a rocket attack on his compound.