Israeli troops fired into a group pro-Palestinian protesters trying to cross from Syria into the Golan Heights on Sunday on the 44th anniversary of the 1967 Six Day War.

The incident took place at the ceasefire line between the two countires, according to Reuters, which also said Syrian state media reported 18 people were killed. Hundreds were wounded, according to CNN.

I have instructed the security forces to act with determination, with maximum restraint, but with determination to maintain our sovereignty, our borders, our communities and our citizens, Israeli Prime Minister Benjamin Netanyau said in a speech marking the anniversary.

The protests began around 11 a.m. with severe dozen youths, however by evening the crowd had grown to more than 1,000, AP reported.

The latest incident followed violent clashes within the month involving Israel and its neighbors.