A bomb blast in Turkey's Diyarbakir province killed two policemen on Monday as security forces raided a building said to be a hideout of suspected Isis militants.
The Isis militants detonated explosives outside the building during the raid, killing two policemen instantly and injuring four others, Turkey's Anadolu news agency reported.
The Isis attack comes just weeks after the deadly Ankara blasts that left nearly 100 people dead.
On 10 October, two blasts went off near the Ankara train station during a rally by local trade unions demanding an end to the fight between the Turkish government and the terrorist organisation PKK.
Turkish Prime Minister Ahmet Davutoglu had said militants of the ISlamic State were the main suspects in the blasts.
Isis had also claimed the deadly Suruc bombing in July that had killed dozens of youth activists.
Violence and terror attacks in Turkey have been spiralling even as the nation is set to go to polls on 1 November for the Turkish general election.