Authorities in Germany have arrested a 40-year-old man suspected of having trained and fought for an extremist group in Syria's civil war.

A spokesman for Berlin prosecutors says police in the German capital swooped on the man Friday after sufficient evidence emerged to warrant his arrest.

Spokesman Martin Steltner says the man had traveled in January to Syria, where he underwent weapons and explosives training before taking part in combat operations. He returned to Germany last month.

Steltner said authorities are examining whether the suspect fought for the extremist Islamic State group.