The blast in Dweil’a on the outskirts of Syria’s capital was carried out as people were praying inside the Mar Elias Church.

A suicide bomber in Syria has carried out an attack inside a church filled with people, killing at least 20 people and wounding dozens more, according to the Syria’s Ministry of Health and security officials.

The explosion in Dweil’a on the outskirts of Damascus took place as people were praying during mass inside the Mar Elias Church on Sunday.

No group immediately claimed responsibility, but the Syrian Interior Ministry said a fighter from the ISIL (ISIS) group entered the church and fired at the people there before detonating himself with an explosives vest, echoing some witness testimonies.

The death toll reported was a preliminary one. “Rescue teams from the Syria Civil Defence continue to recover bodies from the scene,” a statement on Telegram said on Sunday.