Turkey has fired into Syria for a fourth day after a Syrian mortar landed near Turkish village Akcakale, reports say.
Turkish troops responded immediately after the mortar landed near the village of Guvecci in Hatay province, according to Turkey’s Anadolu Agency.
Turkey has been firing into Syria since Syrian mortar fire killed five Turkish civilians on Wednesday.
It was the first time Turkey has taken military action across the border since the Syrian uprising began.
Early on Saturday, the Anadolu Agency said the Syrian mortar had landed over the border during intense fighting between government troops and rebels in Syria’s Idlib province.
The rebels are fighting to topple Syrian President Bashar al-Assad’s government in an uprising that began in March last year.
There were no immediate reports of casualties on the Turkish side.
Following the killing of two women and three children in the Turkish border town of Akcakale this week, Turkey’s parliament authorized troops to launch cross-border operations against Syria and strike at Syrian targets for a period of one year.
The UN Security Council said the incident showed the “grave impact” of the Syrian crisis on “regional peace and stability”.
On Friday, Turkey moved tanks and anti-aircraft missiles into Akcakale, though Turkey’s Prime Minister Recep Tayyip Erdogan said his country did not want war.
President Bashar al-Assad is quoted as saying he regrets “100 per cent” a Turkish jet was shot down after entering Syrian airspace.
In an interview with Turkey’s Cumhuriyet newspaper, Bashar al-Assad argues that the plane was flying in an area previously used by Israel’s air force.
The plane went down in the Mediterranean last month and the two pilots have not been found.
The incident has heightened tensions between the two countries.
President Bashar al-Assad is quoted as saying he regrets "100 per cent" a Turkish jet was shot down after entering Syrian airspace
Last week, Turkish PM Recep Tayyip Erdogan condemned Syria’s action and described the neighboring country as a “clear and present threat”.
Turkey reinforced border areas with rocket-launchers and anti-aircraft guns.
On Sunday, Turkey said it had scrambled six F-16 fighter jets when Syrian helicopters had approached the border.
“We will not allow (the shooting down) to turn into open combat between the two countries,” President Bashar al-Assad is quoted as saying.
Cumhuriyet, which published the interview on Tuesday, does not indicate when it took place but shows a picture of Bashar al-Assad standing beside its Ankara bureau chief Utku Cakirozer.
In other developments:
• Turkish media reported late on Monday that another 85 Syrian soldiers, including 14 senior officers, had defected across the Turkish border. It is one of the biggest groups of army defections since the March 2011 uprising in Syria began.
• Syria has been accused of practicing a widespread policy of state-sanctioned torture, in a Human Rights Watch report . The group says it has identified at least 27 detention centres across Syria.
• UN human rights chief Navi Pillay has said that both Syrian government forces and the opposition have been involved in operations that harmed civilians. She has appealed for further militarization of the conflict to be avoided at all costs.