At least 20 people have been killed and 52 others wounded in a suicide bombing at a church on the outskirts of Damascus, Syria's interior ministry has said.
The attacker entered Mar Elias Church in Dweila during a service and opened fire with a weapon before detonating an explosive vest, the ministry said in a statement.
It added that he was affiliated with the jihadist group Islamic State (IS). There was no immediate claim from the group itself.
The Syrian Civil Defence - whose emergency teams are widely known as the White Helmets - posted photos and video from inside the church showing a heavily damaged altar, pews covered in broken glass and a bloodied floor.
One person told AFP news agency outside Mar Elias that "someone entered carrying a weapon" and began shooting. "[People] tried to stop him before he blew himself up," he added.
