German authorities have arrested three people in a series of raids on suspected supporters of a hardline Islamic group in Syria, according to the Associated Press.

Federal prosecutors said they searched 10 apartments in Berlin, Frankfurt and Bonn on Monday, March 31. They arrested one person in each of the three cities.

Two of them, a German man identified only as Fatih K. and a Turkish man identified as Fatih I., are suspected to be current or former members of the Islamic State of Iraq and the Levant.

The third person, a woman with German-Polish dual nationality identified as Karolina R., is suspected of supporting the group by making payments totaling 4,800 euros ($6,600).

Chief federal prosecutor Harald Range stressed the importance of combating the possible risks posed by radicalized extremists returning from Syria's civil war.