Turkish parliament is about to hand over war powers to president Erdogan for a 1 year term.
Turkey's military struck targets inside Syria on Wednesday in response to a mortar bomb fired from Syrian territory which killed five Turkish civilians, Prime Minister Recep Tayyip Erdoğan's office said in a statement.
"Our armed forces in the border region responded immediately to this abominable attack in line with their rules of engagement; targets were struck through artillery fire against places in Syria identified by radar," the statement said.
"Turkey will never leave unanswered such kinds of provocation by the Syrian regime against our national security," it added.
There were no immediate details of the Turkish strikes against Syria, nor was it clear who had fired the mortar into Turkish territory.
He added that Syria was investigating the source of the mortar bomb that killed five civilians and urged restraint after Turkey's military struck targets inside Syria.
Syria's Information Minister Omran Zoabi conveyed his condolences to the Turkish people, saying his country respected the sovereignty of neighboring countries. He also called on other countries to respect Syria's sovereignty and to control their borders to stop gunmen from entering Syria.
Davutoğlu had also agreed with NATO Secretary-General Anders Fogh Rasmussen on the need for an emergency meeting of NATO members, the statement said.
A mortar bomb fired from Syria landed in a residential district of the southeastern Turkish town of Akçakale on Wednesday, killing a woman and four children from the same family and wounding at least 13 other people.