Three Turkish police officers were killed in a clash with suspected ISIS militants in north-western Turkey on Monday. Six militants were killed in the operation, Interior Minister Ali Yerlikaya said.
The shooting occurred in Yalova province, south of Istanbul, as police stormed a house where the militants were hiding.
Eight other police officers and a night guard were wounded, Mr Yerlikaya told reporters.
Broadcaster NTV said the suspects had opened fire on police as they launched the operation. Police special forces were sent from nearby Bursa province to provide support, it added.
Several schools in the region were closed, while vehicles were also prohibited from entering the area where the incident took place, state broadcaster TRT Haber reported.
It was not reported whether any suspects were injured or arrested.
Turkey has stepped up operations to curb extremism and prevent terrorist attacks.
Last week, Turkish police arrested 115 suspected ISIS members who they said were planning to carry out attacks on Christmas and New Year celebrations.
The group has carried out several deadly attacks in Turkey. In January 2024, two gunmen attacked a Catholic church in Istanbul during Sunday Mass, killing one man.
Early on January 1, 2017, an ISIS gunman killed 39 people celebrating the New Year at a nightclub in Istanbul.
In addition, hundreds of people were killed in ISIS attacks on Ataturk Airport in Istanbul and in the south-eastern city of Diyarbakır between 2015 and 2017.
