There was heavy shelling on the city by pro-Gaddafi forces.
Fighting subsided compared to previous weeks, while pro-Gaddafi forces continued to shell the city.
He added that while pro-Gaddafi forces had retreated from the city, they were still outside and would be in a position to bombard it.
A rebel spokesman claimed the aircraft was shot down by pro-Gaddafi forces.
In addition their data shows that between 152 and 168 civilians were deliberately killed by the pro-Gaddafi forces in 2011.
But on the outskirts, they are surrounded by pro-Gaddafi forces.
According to the rebels, the pro-Gaddafi forces at the university used civilians as human shields.
During the night, pro-Gaddafi forces withdrew to the outside of the city, according to local witnesses.
Brega was captured later in the day by pro-Gaddafi forces.
It was confirmed that pro-Gaddafi forces had entered the city centre earlier in the day.