Egyptian security officials say one person was killed and four wounded in a series of bomb blasts in two central Cairo districts.

The officials say four bombs exploded in the residential districts of Imbabah and Mohandiseen in the Egyptian capital, home to some 18 million people.

The officials spoke on condition of anonymity because they were not authorized to speak to the media.

Egypt has for years been battling a burgeoning insurgency in the Sinai Peninsula, but the frequency of attacks against army and police there has dramatically increased since the 2013 ouster of Islamist President Mohammed Morsi.

Small bombings have also been carried out in Cairo and other cities.