An Irish Aid agency working in Syria, is concerned a fresh escalation of the conflict could be on the cards.
It's after a Russian military pilot was reportedly killed after his fighter jet was shot down.
It happened in a rebel-held area near Idlib in the north of the country.
The Syrian Observatory for Human Rights says the pilot was alive when he landed - but was killed after resisting capture by militants.
GOAL's Regional Security Advisor for the Middle East, Derek O Rourke, says it's a worrying development:
