More than 5,000 spectators at a basketball game in Strasbourg sang together in tribute to victims of a shooting in the city that killed three people.

The touching moment took place after fans were told to remain in the Rhenus Sport arena as the shooting broke out on Tuesday. They were then evacuated safely.

Footage taken by SIG Strasbourg basketball club shows spectators singing the French national anthem, La Marseillaise, in tribute to those affected by the shooting.

The 5,034 spectators of the game between SIG Strasbourg and Olimpija Ljubljana were told to stay inside the stadium during the shooting, while the nearby European Parliament was also placed on lockdown.

Authorities in France have launched a terror investigation into the shooting at a Christmas market which killed three people and left 11 injured.

The mayor of Strasbourg, Roland Ries, said the Christmas market will be closed on Wednesday and flags will be lowered to half-mast.