BERLIN, Feb. 15 (Xinhua) -- The German city of Braunschweig cancelled a carnival parade on Sunday because of a "concrete endangerment by an attack with Islamist background", German media reported.

The police has requested all visitors "not to come to the parade route or even not to make the trip to Braunschweig," German media Focus Online reported.

Reliable sources of Germany's state security apparatus believed there was a specific threat by an attack with Islamist background, according to the report.

The information had been received in the night and evaluated in the morning, according to a police spokesman.

The report said the police had made it clear that the danger "must be taken very seriously".

The parade should have started at 1120 GMT on Sunday in Braunschweig. Braunschweig's carnival parade is one of the biggest in Germany and attracts up to 300,000 visitors each year. Enditem