Turkish planes have for the first time carried out air strikes against Islamic State (IS) group targets in Syria, the BBC reports.
Turkish police also raided more than 100 properties in Istanbul, arresting 251 people linked to IS, the office of Prime Minister Ahmet Davutoglu said.
On Thursday, Turkish forces exchanged fire with IS fighters near the Syrian border. One Turkish soldier was killed.
Turkey will now let the US launch air strikes against IS from the Incirlik air base, US officials have said.