German police stormed a pharmacy in Cologne's main train station Monday, freeing a woman who had been held hostage by a man for two hours, officials said.
Travellers were ordered to evacuate the large central station, which sits on Cologne's Dom Platz beneath the city's historic cathedral early Monday afternoon.
German police say they now have an armed assailant at Cologne's main railway station "under control" and the woman he took hostage is receiving medical treatment.
Police also said the suspect had been seriously injured during their operation and was being resuscitated. The area in and around the station - a major transport hub - has been cordoned off.
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"We are in contact with the man", police spokesman Christoph Gilles told broadcaster n-tv at the time. Deutsche Bahn is cancelling or delaying train services in Cologne.
"We need to find out what he wants, what his demands are and whether he carries a weapon", he said, adding that police weren't aware of the man's motive.
Police could not confirm eye-witness reports that shots and explosions were heard.
Ambulances and heavily-armed police were lined up in wait behind the train station. "A female hostage has sustained light injuries and is being tended to".