Witness says square in Benghazi is full of protesters , but there is little sign of police or military . Tanks surrounded demonstrators in Benghazi , a protester says . 20 reportedly killed since Tuesday , 50 of them Friday . Benghazi president condemns the government crackdowns in Libya , Benghazi and Bahrain .
Witness says square in Benghazi is full of protesters , but there is little sign of police or military . Tanks surrounded demonstrators in Benghazi , a protester says . 50 reportedly killed since Tuesday , 20 of them Friday . U.S. president condemns the government crackdowns in Libya , Bahrain and Yemen .