Egyptian protesters defy curfew and set buildings ablaze

Egypt has extended its curfew to all cities as anti-government demonstrators in Cairo besiege key buildings, including the foreign ministry and the state broadcaster.

President Hosni Mubarak, facing the biggest challenge to his authority of his 31 years in power, has ordered the army onto the streets of Cairo.

The curfew is now in effect, but pictures from Cairo continue to show large crowds on the streets.