German police have been called to a hospital near the border with Belgium with reports of a woman having "ignited pyrotechnics."

There are reports from German news outlet Bild of heavily armed police with helmets, protective vests and submachine guns at the Luisenhospital in Aachen.

A police spokesman told German news outlet, T Online: "There are indications that this is a possible threatening situation and people should avoid the area.

"There will be road closures and restrictions on rail traffic. Avoid the area as much as possible."