The army moved tanks and armoured vehicles to the border town of Mursitpinar which lies across from the key Kurdish town of Ain al-Arab after some stray bullets hit Turkish villages, sparking retaliation from Turkey's military under its "rules of engagement."
The government said today it would shortly submit motions to parliament authorising the armed forces to take action in Iraq and Syria, so Ankara can join the US-led coalition against the IS fighters.
Prime Minister Ahmet Davutoglu has said the motions will be debated on Thursday.
Turkey had refused to join a broad anti-IS coalition led by the United States while dozens of its citizens including diplomats and children were being held by IS militants having been abducted from the Turkish consulate in the northern Iraqi city of Mosul.
After securing their freedom in a top-secret operation which reportedly resulted in the release of 50 IS fighters, President Recep Tayyip Erdogan said the country's position had changed, signalling a more robust stance towards the IS group.
"We cannot stay out of this."
The government hopes parliament will approve the military action before the Muslim Eid holiday which begins on Saturday.
Today, Erdogan said the Islamic State -- blacklisted as a terrorist organisation by Ankara since October 2013 -- has nothing to do with Islam, which he said "does not legitimise such savagery or violence."
"Attributing terrorist actions in the Middle East to Islam means nothing other than distorting the truth," he said in a speech in Istanbul. "Our religion is a religion of peace."
Turkey has so far accepted over 160,000 Syrian refugees who fled the IS assault near the town of Ain al-Arab, and has called for creating a safe buffer zone to help civilians inside Syria.
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