Updated

Turkish authorities have detained three Iraqi brothers who are suspected of making suicide bombs for the Islamic State group.

Turkey's state-run Anadolu Agency reported Friday that the suspects were caught during police raids in the Black Sea coastal city of Samsun. They are accused of setting up a factory in Mosul, the ISIS stronghold in Iraq, where they allegedly produced bombs for suicide attackers.

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The arrests resulted from a broader investigation into ISIS activities by a regional prosecutor in northwest Turkey.

Turkey has suffered a series of suicide attacks linked to ISIS, which has a network of cells and supporters in the country. In Istanbul on New Year's Eve, an attack on a nightclub by a gunman acting on orders of ISIS claimed the lives of 39 people.