There has been an explosion at the metro in Paris, media reported on Wednesday, citing a witness at the scene.

Axar.az reports that the source said he was on the train when the blast took place close to the Nation station on metro line 1. He said that the metro has since been evacuated and that the explosion was probably due to a mechanical problem.

Other sources claimed the explosion was "a detonation without damage" between Porte de Vincennes and Nation stations, adding there was a "big flash and huge noise," as if it was coming from an "enormous firecracker."