According to a dpa reporter, heavily armed officers wearing helmets were also involved in the large-scale police operation at an Aachen hospital. A helicopter was circling over the site on Monday evening. In addition, numerous fire and rescue services are on duty. The place was cordoned off over a large area.

The police confirmed a “possible threatening situation” in the hospital on Monday evening. The possible threat comes from a woman in the hospital, said a Cologne police spokeswoman.