Turkish media reports say police have detained 10 suspected Islamic State militants in raids.

The Dogan news agency said Monday that the suspects were detained for questioning following simultaneous early morning raids to homes in the northwestern province of Sakarya on Sunday.

There was no immediate official confirmation of the raids, which were also reported in the pro-government Sabah newspaper.

The suspects are believed to be Turkish citizens; there was no further information on them.

Last month, authorities detained five Turks suspected of belonging to the IS group.

Three suspected foreign IS militants were arrested last year after killing a soldier, a policeman and a truck driver in an armed attack in Nigde, central Turkey.

Turkish authorities say hundreds of Turks have joined the group in Syria and Iraq.