Turkey's government says it has bombed Islamic State (IS) targets in Syria.
A day earlier the two sides exchanged fire near the border, with one soldier killed and two more injured.
Turkey is to let the US carry out air strikes against the Islamic State group from a key military base near the Syrian border, US officials have said.
Turkish police also launched raids to arrest suspect IS militants on Friday morning in more than 100 locations in Istanbul.
The raids were carried out in 26 districts of the city and involved 5,000 officers. Members of the the outlawed Kurdistan Workers' Party (PKK) were also arrested.
A statement released by Prime Minister Ahmet Davutoglu's office said that F-16 jets had hit three IS targets in Syria.
The decision to carry out the attacks was taken at a security meeting called after Thursday's border clashes.
Turkish state TV said that the jets had not violated Syrian air space as they attacked the border town of Havar.
'A game changer'
The US is expected to step up bombing raids against IS after reaching an agreement with Turkey to use the Incirlik airbase.
The agreement was finalised in a phone call between President Barack Obama and his Turkish counterpart Recep Tayyip Erdogan on Wednesday. It was confirmed by US officials speaking on condition of anonymity.
The use of the Incirlik airbase broadens the US military's ability to strike IS targets - one US official told the New York Times it was a "game changer".
Once used in raids against former Iraqi leader Saddam Hussein, the base is near to Turkey's long border with Syria, and significantly narrows the distance to the IS stronghold of Raqqa.