At least 13 people have been killed in an explosion at a church in northern Egypt, state media say.
The blast targeted the St George Coptic church in the city of Tanta, north of Cairo.
A number of television channels said at least 40 people had been injured in the Palm Sunday attack.
The cause of the explosion is not yet known but Egypt's Christian minority has often been targeted by Islamist militants in recent years.
In December last year, 25 people died when a bomb exploded at a Coptic cathedral in Cairo during a service.
The explosion occurred as Coptic Christians were celebrating Palm Sunday, one of the holiest days in the Christian calendar, marking the triumphal entry of Jesus Christ into Jerusalem.