Beirut/Istanbul: At least 15 people have been killed and 65 wounded in a car bombing that targeted a field hospital in the Syrian town of Atma near the border with Turkey, activists in the area say.

The explosion has almost destroyed the hospital.

“Those killed and injured were patients and medical staff at the charity hospital,” one activist said

Ambulances raced from Turkey to retrieve the dead and wounded, said the private Turkish Dogan news agency.

The blast occurred near the Orient hospital in the rebel-held northwestern Syrian town of Atmeh, the activists reported. Atmeh hosts a sprawling camp for thousands of displaced Syrians. It wasn’t immediately clear who operated the hospital, nor who may have carried out the bombing.

A February 20 car bomb targeted the Bab Al Salama border crossing in another part of northern Syria. The region is contested between rebel brigades and an Al Qaida breakaway group, the Islamic State in Iraq and the Levant.