Five supporters of the Islamic State terrorist group have been arrested in Germany, Spain and Belgium on suspicion of spreading jihadist propaganda, the Interior Ministry in Madrid said Wednesday.
The group, made up of four Spanish and one Moroccan national, had represented a "persistent and serious danger to security in Europe," Interior Minister Jorge Fernandez Diaz said after announcing the arrests.
The men were detained in the Spanish city of Barcelona, Melilla - a Spanish enclave on the northern coast of Africa - Brussels and Wuppertal, the ministry said.
The Wuppertal prosecutor's office said the man arrested in Germany was a 20-year-old Spaniard and that he was being investigated for spreading Islamic State propaganda including videos of beheadings.
The man was arrested and his apartment raided, with police confiscating a personal computer, a spokesman said, adding that German authorities are in the process of deciding whether he will be extradited to Spain.
Spanish officials said the group had managed a Facebook site called Islam en Espanol (Islam in Spanish), which had circulated jihadist content to its 32,500 followers with the aim of radicalizing and recruiting them on behalf of the terrorist group.