Four people were injured, two of them seriously, by axe blows on Monday on the RER E at Ozoir-la-Ferrière station (Seine-et-Marne), according to a police source quoted by AFP.

At around 8 a.m., on the RER E, a fight broke out involving several people for an as yet unknown reason. One of the victims had his hand chopped off and another had his skull chopped open with an axe, the source added. Two others suffered minor injuries.

Police and firefighters are on the scene, according to RER E’s X account.