Hundreds of German police officers searched about 190 offices, mosques and apartments of members and supporters of the Islamic group "The true religion" as the government announced a ban of the organization Tuesday.
Police raided places in 60 cities in western Germany and also in Berlin seizing documents and files, German Interior Minister Thomas de Maiziere said. Police made no arrests, government officials told Fox News.
Police said they also found communications equipment, machetes, tasers, knives and knuckle dusters.
The group — also known as "Read!" — has been distributing German-language copies of the Quran across the country. The interior minister said that more than 140 youths had traveled to Syria and Iraq to join fighters there after having participated in the group's campaigns in Germany.
"The translations of the Quran are being distributed along with messages of hatred and unconstitutional ideologies," de Maiziere told reporters in Berlin. "Teenagers are being radicalized with conspiracy theories."
Young men in long robes and bushy beards handing out German copies of the Quran has been a common sight in downtown and shopping areas across Germany for several years.
The ban of the group comes a week after security authorities arrested five men who allegedly aided the Islamic State group in Germany by recruiting members and providing financial and logistical help. The recent operations suggest that the German government is trying to clamp down hard on radical Islamists.
The German interior minister stressed that the ban does not restrict the freedom of religion in Germany or the peaceful practice of Islam in any way, but that the group had glorified terrorism and the fight against the German constitution in videos and meetings.
"We don't want terrorism in Germany ... and we don't want to export terrorism," de Maiziere said adding that the ban was also a measure to help protect peaceful Islam in the country.
Fox News' Kitty Logan and The Associated Press contributed to this report.