Police said only that he was injured during the police operation to free the woman. It was not immediately clear how he was injured.
Local media reported shots being fired inside the station, something which a police spokesperson later denied. The entire station, one of the biggest in the country, was evacuated and closed off as well as Breslauer Platz square behind the station.
An armed man has taken a woman hostage at a chemist's there, a police spokesman says.
A man has suffered life-threatening injuries after holding a woman hostage in the German city of Cologne.
Locally published newspaper the Koln Express reports a hostage was taken in a pharmacy inside the station and that fire engines were also called after officers responding to the incident smelt burning.
Police on Twitter told people to avoid the train station.
National Football League 2018 Week 6: Jaguars vs. Cowboys preview, statistics, odds
Jacksonville's defense is actually first in the league in terms of yards per game while they rank tied for third in points. The offense and defense both have to be good. "You have to somehow, some way try to affect him with your pass rush".
The police spokeswoman said police were unaware of any shots having been fired.
Police tweeted that the hostage was slightly injured and was now being treated.
The woman sustained minor injuries and was treated at the scene.
German railroad operator Deutsche Bahn said all train traffic at the station was shut down.
Special police operate outside the Cologne, western Germany, train station Monday, Oct. 15, 2018.