People were killed and injured in an attack at a festival in the city of Solingen in western Germany on Friday, the news agency dpa reported.
It was not immediately clear how many casualties there were.
The dpa report cited unidentified police sources as saying the weapon was believed to be a knife and no arrests had been made yet.
Solingen has around 160,000 inhabitants and is located near the bigger cities of Cologne and Duesseldorf.
