Updated at 9 a.m. ET: Another mortar shell from Syria struck Turkish territory on Saturday, prompting a fourth day of retaliatory artillery fire from Turkey, the state-run Anadolu Agency reported.

The mortar landed in a rural area near the village of Guvecci, during intense fighting between the forces of Syrian President Bashar Assad's regime and the rebels in Syria's Idlib province across the border.

No one was hurt by the mortar, but Turkish troops near Guvecci immediately responded with "counter-fire," the agency said.

Mourning, sighs of relief in Turkish town shelled by Syria

The latest shelling came a day after Turkish Prime Minister Recep Tayyip Erdogan called on Syria not to test Turkey's "limits and determination."

Turkish artillery has been responding to shelling from Syria since Wednesday, when a mortar landed at a Turkish border town, killing five civilians.

Turkey strikes targets in Syria after mortar attack kills 5

Turkey's parliament on Thursday also voted to allow cross border military operations in Syria, further raising tensions between the neighbors that were once close allies.

The Hatay governor's office said the round fired from Syria on Saturday landed on empty land about 50 yards inside Turkey.

"It is assessed that the shell was fired by Syrian Arab Republic security forces at opposition forces along the border," a statement on its website said.  "There was no loss of life in the incident. The Guvecci border post retaliated in kind with four rounds from 81 mm mortars."

The Dogan news agency said another mortar round from Syria landed around 50 yards from an observation tower near Guvecci around 11 a.m. and smoke rose from the area. There were no immediate reports of casualties or retaliation but a response was expected.

Separately, the governor's office warned people in the area not to go out on balconies or spend time in open places, Dogan said. It said the Red Crescent was offering psychological support to people in the area.

There were two similar incidents in Hatay on Friday.

"Those who attempt to test Turkey's deterrence, its decisiveness, its capacity, I say here they are making a fatal mistake," Erdogan said in a bellicose speech to a crowd in Istanbul on Friday afternoon.

"We are not interested in war, but we're not far from war either. This nation has come to where it is today having gone through intercontinental wars," he said. 

The Associated Press and Reuters contributed to this report.

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