Turkey scrambled six F-16 fighter jets on its border with Syria, after Syrian helicoptors flew close to its border on Saturday.
In a statement, the Turkish army said that three such incidents were observed on Saturday, however, there was no violation of Turkish airspace.
On Friday, Turkey began deploying rocket launchers and anti-aircraft guns along the border.
The move comes after a Turkish jet in the border area was shot down by Syrian forces, prompting the Turkish Prime Minister Tayyip Erdogan to say that Syria as an "open threat" to his country.