Europe’s foreign policy chief Josep Borrell said he spoke with Lebanon’s Foreign Minister Abdallah Bou Habib and the Arab League Secretary-General Ahmed Aboul Gheit about the rocket attack on the town of Majdal Shams in the occupied Golan Heights which killed 12 children and teenagers on Saturday, Al Jazeera reports.

Borrell said the discussion focused on the need to “clarify the causes” of the “Majdal Shams’ bloodshed”, ways to “avoid a regional war”, and reaching a ceasefire agreement in the Gaza Strip.

“Far too many children have been killed already,” Borrell wrote in a post on social media.

Fear is mounting that a strong attack by Israel on Lebanon-based Hezbollah — which it blames for the strike on the Druze town in the Golan Heights — could lead to a regional conflict.

Hezbollah has denied carrying out the attack.