Turkey has warned the UN Security Council that Syria's shooting down of a Turkish military plane represents a "serious threat" to regional security.
Turkey's deputy prime minister also said Syria's actions "would not go unpunished", but made it clear it was not seeking military action.
The comments come as NATO's governing body prepares to hold an emergency meeting to discuss Friday's incident.
Damascus insists the F-4 jet was shot down inside Syrian airspace.
In a letter to the Security Council, Turkey condemned the "hostile act by the Syrian authorities against Turkey's national security".
It said it posed "a serious threat to peace and security in the region".
Tensions between Syria and Turkey rose even higher yesterday when Turkey accused its neighbour of firing on another of its planes.