Two home-made bombs hit a mosque and a conference center in eastern Germany late Monday in what officials called a "xenophobic" attack, NBC News reported.
No one was injured by the blasts in Dresden, birthplace in 2014 of the anti-Islam PEGIDA movement, whose name is an acronym for Patriotic Europeans Against the Islamisation of the West.
The city's police chief said officials were "now in crisis mode."
"Even though there has been no claim of responsibility, we have to assume that there is a xenophobic motive," Dresden police chief Horst Kretzschmar said in a statement.
A recent government report warned that xenophobia was rising in ex-communist eastern Germany.