One person has been killed and 10 others wounded in a shooting in the eastern French city of Strasbourg, police say.
The gunman is still at large, they added.
The French Interior Ministry confirmed a "serious public security incident" in the city and urged residents to stay indoors.
The shooting is said to have happened close to a Christmas market in one of the central squares, Place Kleber.
Security officials have cordoned off the area and trams have been stopped, according to reports.
Eyewitness Peter Fritz told the BBC he heard gunfire and found a person who had been shot, lying on a bridge. He said he tried to resuscitate him but the man died.
Some unconfirmed reports said three people had died.
Local journalist Bruno Poussard wrote on Twitter that there had been a dozen shots fired on his street in the city centre - one or two to begin with, then in bursts.
Emmanuel Foulon, a press officer for the European Parliament, wrote that there was "panic" in the centre following the sound of gunfire and that police with guns were running through the streets.
Strasbourg deputy mayor Alain Fontanel tweeted: "Shooting in downtown Strasbourg. Thank you all for staying home while waiting for a clarification of the situation."
A shopkeeper told BFM TV: "There were gun shots and people running everywhere. It lasted about 10 minutes."
The European Parliament, which has a base in Strasbourg, was sealed off with no-one able to leave or enter the building.
British MEP Richard Corbett tweeted that he was in a restaurant in the city and the doors had been locked.