At least 10 people have been killed and 24 injured in an attack on a Christian church in Alexandria in northern Egypt.
A car parked outside the church in the Sidi Bechr district detonated shortly after the Coptic Christian midnight mass on New Year's Day, according to witnesses and police sources.
Police said they did not know exactly what caused the explosion but are currently investigating the scene.
After the bombing, Christians pouring out of the church clashed with security forces who had arrived on the scene, as well as with Muslims who had gathered. Some of those involved in the fighting were reportedly injured, and police used teargas to disperse the crowd.
The attack comes after Egypt's interior ministry promised it would increase security around Christian sites following threats on Egyptian Christians by Al-Qaeda in Iraq, Al Jazeera's Ayman Mohyeldin reported from Cairo.
The bombing also comes a year after another attack on Coptic Christians - a drive-by shooting in the town of Nag Hammadi that left six Christians and one Muslim dead.