Assailants on Thursday fired at a convoy of Austrian UN peacekeepers at an airport near Damascus, wounding two soldiers, Austria’s Defense Ministry said.

The Austrian Defense Ministry said in a statement that the injuries sustained by the soldiers were not life-threatening.

The statement added that it was unclear whether the shots were fired by rebels or military forces.

Austrian peacekeeping soldiers monitor the Syrian side of the Golan Heights.

The revolt in Syria started as peaceful protests but turned into a civil war after brutal crackdowns on dissent by Assad’s forces. Activists say more than 40,000 people have been killed in almost two years of fighting.