ISIS-affiliated channel threatens Allianz Arena terror attack forcing police to ramp up presence for Klassiker between Bayern Munich & Borussia Dortmund

The image showed a red target marker on groups of people outside the stadium and seemed to suggest a threat ahead of Saturday's game between Bayern Munich and Borussia Dortmund. Alongside the image, and written in Arabic, are the words: "After the game". Following the Crocus City Hall terror attack in Moscow on March 22, several countries have increased their terror alert levels and there will be a greater police presence at the game.

A spokesperson for the Munich police told t-online: "The officials intensively evaluated the posts and assessed the situation. There are currently no indications of an acute danger situation. Nevertheless, police attendance at the game this evening would be increased. Around 100 of emergency forces were supposed to be on site regularly, but that will now be reinforced with additional officers."

T-online also contacted Bayern Munich ahead of the game and in response to the threat. Bayern say that that they are and remain in close communication and coordination with the police, who are in charge of the matter.

The game between Bayern and Dortmund is still scheduled to go ahead as planned at 5.30pm (GMT) given the police investigations finding no 'acute danger' at present. There will be increased levels of security in response to the threat, however.