Egypt's state-run news agency says three civilians were injured in an explosion in a populated neighborhood in Cairo, the capital.

The Mena news agency says the explosive device, which was placed in a street in the Feisal neighborhood, was detonated late Wednesday while a police convoy was passing through.

The news agency says the authorities have arrested one suspect after in the explosion which has also damaged two two police vehicles.

Egyptian authorities have been battling an Islamic Insurgency in northern Sinai which has also spilled over into mainland Egypt, with a series of high-profile assassinations and bombings taking place in Cairo.