BEIRUT — A car bomb went off Sunday near a Syrian field hospital just across from the Turkish border, causing casualties, said activists and Turkish media.

Ambulances raced from Turkey to retrieve the dead and wounded, said the private Turkish Dogan news agency. Syrian activists of the Idlib News group listed 11 people wounded, including a five-month-old baby, who were rushed to Turkey.

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-Qaeda breakaway group, the Islamic State in Iraq and the Levant.

Copyright 2014 The Associated Press.