Around 350 police are searching for an alleged gunman after three people were killed and 12 injured near a Christmas market in France.
A terror investigation is underway into the shooting which occurred in the city of Strasbourg, with the 29-year-old alleged attacker still at large.
The suspect, who is known to the security services and was on a terror watch list, was shot and injured by soldiers guarding the Christmas market but escaped in a taxi, according to French news channel BFM TV.
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France has now raised its security level to "emergency attack", which means stricter border controls and the implementation of reinforced controls on all the Christmas markets that are taking place in the country.
It is understood the Foreign Office has not yet received any reports of British nationals caught up in the shooting.
French president Emmanuel Macron attended a Interdeparmental Crisis Centre meeting following the attack, and later tweeted that the "solidarity of the entire nation" was with "Strasbourg, the victims and their families".
France has been hit by several extremist attacks in recent years, including the 2015 Paris shootings which left 130 people dead and wounded hundreds more.
In 2016 a truck was driven into Bastille Day crowds in Nice, killing 86 people and leaving hundreds injured.
Twelve people were killed and 48 were injured when a man drove a truck into crowds at a Christmas market in Berlin in 2016.