Cairo bomb attack kills one, injures four

One person has been killed and more than four injured when a bomb exploded close to a bus in the capital, Cairo, Egyptian security officials say.

The bomb was planted on a pedestrian island and exploded as the bus passed by, a security source said.

The bombing happened on a busy street in the northern district of Nasr City.

It comes a day after the government declared the Islamist Muslim Brotherhood movement a terrorist organisation.

The group, whose candidate Mohammed Morsi won the presidential election in 2012 before being deposed by the military earlier this year, had already been outlawed.

A Muslim Brotherhood leader in exile vowed that protests would continue.

In recent months Egypt has seen a wave of attacks which the authorities have blamed on Islamist militants.