Witness says square in Tripoli is full of protesters , but there is little sign of police or soldiers . Tanks hit demonstrators in Benghazi , a witness says . Demonstrations unfolded Friday in other cities as well , he said . 50 reportedly killed since Tuesday , 20 of them Friday . Libyan president condemns the military actions in Libya , Bahrain and Yemen .
Witness says square in Tripoli is full of protesters , but there is little sign of police or soldiers . Tanks hit demonstrators in Benghazi , a witness says . 50 reportedly killed since Tuesday , 20 of them Friday . Libyan president condemns the military actions in Libya , Bahrain and Yemen .