Explosion in Lyon, France: at least 13 people were injured

The tweet also said the police chief and the prosecutor were on the scene, while the Lyon prosecutor's spokeswoman told CNN that the blast could have been caused by a bundle of trapped nails.

Despite the words of the spokesperson of the Office of the Prosecutor on a possible explosive package, the fact is that the cause of the explosion recorded around the central square of Bellecour is still unknown.

"The reasons for the explosions will be sought later", he said to CNN the communication and information service of the national police.

Priority is given to treating the wounded, "whether it's a car accident or a terrorist attack," they added.

The President of France, Emmanuel Macron, said that he was closely following the siatuación.

"Something is happening in Lyon, there are wounded but no one is dead", said the president.

Until now, no organization has claimed the possible attack.