German police raided a holy mosque and seven homes on Tuesday looking for ISIS members and an ISIS recruiter.
** Germany is expected to accept 750,000 new migrants this year from the Middle East.
Advertisement - story continues below
Radical Salifist imams in Germany are already recruiting Muslim migrants arriving into the country.
75% of the migrants flooding into Europe are men.
Police were seen carrying computers and bags from the holy mosque as part of their investigation.
German police carried out dawn raids in Berlin Tuesday targeting individuals suspected of inciting people to go and fight for the Islamic State group in Syria.
The raids began at 6:30 am (0430 GMT) and targeted, among others, a 51-year-old Moroccan suspected of recruiting for the jihadists, police said in a statement.
A 19-year-old Macedonian thought to be currently in Syria is also suspected of involvement in the recruitment drive, it said.
“We are looking for evidence to see whether these allegations are true,” a police spokesman said. No arrests were made.
One raid was conducted at an association linked to a mosque in Berlin’s central Tempelhof district, the spokesman said. Seven homes were also searched.
An AFP photographer saw police leaving the building housing the mosque carrying bags and computers seized as evidence.