Photos: Yemen protests

Anti-government protesters throw rocks at police as smoke rises from a government building during clashes in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

A defected army soldier backing anti-government protesters takes position behind a barrier as they flee when police opened fire into the air during clashes in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Pro-opposition students shout slogans as they try to enforce a boycott of studies at Sanaa University campus as part of protests demanding Yemen’s President Saleh to step down.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protesters react after police fired tear gas at them during clashes in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protesters throw rocks at police as smoke rises from a government building during clashes in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protesters shout slogans as they march to demand the ouster of Yemen’s President Ali Abdullah Saleh in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protester waves Yemen’s national flag as he tries to stop fellow protesters from fleeing after security forces opened fire to disperse them in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Medics attend to a baby boy who was caught in the cross fire during clashes in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protester reacts after he was injured during clashes with security forces in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protesters carry a fellow protester injured during clashes with security forces in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Woman reacts as she waits outside makeshift clinic for news about her son, who was injured during clashes, in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protesters carry a fellow protester injured during clashes with security forces in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protester rests on a street occupied by protesters after clashes with security forces in Sanaa.  (Khaled Abdullah Ali Al Mahdi / Reuters)

Anti-government protesters demanding the ouster of Yemen’s President Ali Abdullah Saleh react after security forces fired tear gas grenades at them during clashes in the southern city of Taiz.  (STR New/Reuters)

Anti-government protesters demanding ouster of Yemen’s President Saleh flee after security forces fired tear gas grenades at them during clashes in Taiz.  (STR New/Reuters)