Egyptian protesters have firebombed an office of satellite broadcaster Al-Jazeera in the third day of violence in central Cairo.
They attacked the studio overlooking Tahrir square with petrol bombs early Wednesday, leaving it gutted by fire hours later.
Youths and security forces have been clashing in the area since Monday, with protesters hurling stones and firebombs and security forces firing birdshot and tear gas into the crowd.
Some protesters had been accusing Al-Jazeera of bias in support of the Muslim Brotherhood, Egypt's most powerful political force from which president Mohammed Morsi hails.
The protests started on the first anniversary of a previous street battle between police and demonstrators that left 42 protesters dead.