Updated

A security official says hundreds of low-ranking police have set fire to parts of the security headquarters in Cairo after four days of protests to demand better salaries.

The official says the protesters hurled firebombs at the building, setting parts of it ablaze. The official spoke on condition of anonymity because he was not authorized to speak to the press.

The official says soldiers tried to disperse the crowd by firing in the air, but failed.

Egypt is now ruled by military commanders after massive protests ousted longtime President Hosni Mubarak.

Egypt's police fired on protesters early in the uprising, cementing the loathing many Egyptians feel for the security forces over widespread bribe-taking, abuse and torture.