An explosion near Cairo’s Coptic cathedral has killed at least 20 people.

Egypt’s state-run television said 22 people had been killed and 35 injured in the blast, citing health ministry officials.

Local media reported the explosion hit St Peter’s church next to the cathedral, within the same complex.

Photos and video footage showed damage to the exterior of the church, with shattered windows and broken roofing.

The cause of the blast was not immediately clear.

The explosion happened at around 10:00 local time (08:00 GMT). Local media reported that Cairo’s security chief, Khalid Abdel Aal, arrived to inspect the scene.

Egypt’s Coptic Christians make up about 10{d59e984f9fbc5c09e4ab0305e27bfa5819922b7230cd324f89a660f78358ca33} of the country’s population.