Investigators in several Austrian regions carried out raids early Monday on people and organizations suspected of supporting the Muslim Brotherhood and Hamas groups, prosecutors said. Authorities said there was no link between Monday's action against suspected Islamic radicals and the attack in Vienna a week ago in which an assailant — described by officials as a supporter of the Islamic State group — fatally shot four people before being shot and killed by police. Prosecutors in Graz said more than 70 people are under investigation in the new case and 60 properties, including apartments and offices, were searched, the Austria Press Agency reported.