Turkish state media say another mortar bomb from Syria has landed in southern Turkey.
The Anatolian news agency says Turkish military returned fire Saturday after the bomb landed in a rural area amid intense clashes on the Syrian side of the border in Idlib province.
The latest shelling came a day after Turkish Prime Minister Recep Tayyip Erdogan warned Syria against continued cross-border attacks.
In a fiery speech in Istanbul, Mr. Erdogan said Syrian President Bashar al-Assad's government should not test Turkey's ability to strike back.
His remarks came two days after a Syrian attack on the Turkish town of Akcakale killed five civilians in one of the most serious cross-border incidents in Syria's 18-month uprising.
Following the attack, Turkish forces shelled Syrian targets, and Turkey's parliament authorized military operations outside its borders if necessary.