Turkey has warned it will respond to any further military action by Syria following the shooting down of one of its jets.
Prime Minister Recep Tayyip Erdogan said that Turkish forces "will respond to all violations on the Syrian border."
He said Syrian helicopters have violated Turkish airspace five times recently, without Turkish response.
Syria insists that the Turkish plane violated its air space. But Turkey says that although the plane had unintentionally strayed into Syria, it was inside international airspace when it was brought down on Friday.
Meanwhile the head of Nato called the jet's destruction unacceptable, and said the alliance condemned it 'in the strongest terms.'
Nato Secretary-General Anders Fogh Rasmussen expressed solidarity with Turkey but made no mention of retaliatory action.
He said Nato was following the situation closely. "I certainly expect that such an incident will not happen again," he said.