A shell fired from Syria early Monday landed in southeastern Turkey without injuring anyone, Turkish television reported.
The shell dug a deep crater in an olive grove near Akcabaglar in Kilis province, damaging some trees, according to NTV and CNN-Turk.
It was not clear whether it was fired by troops loyal to Syrian President Bashar al-Assad or by rebels fighting to oust his regime.
Since the shelling in early October of the Turkish border village of Akcakale killed five civilians, Ankara forces have replied in kind each time Syrian fire hits Turkey, with Damascus generally being held responsible.
To protect NATO member Turkey from possible Syrian threats, the United States, The Netherlands and Germany are to deploy batteries of ground-to-air Patriot missiles and hundreds of soldiers in the next few days along the Syrian border in southern Turkey at the request of Ankara.