A woman and her three daughters have been attacked by a knife-wielding man at a holiday site in the south of France, according to French media.
Three victims were seriously injured and taken to hospital after the attack which happened around 10:00 local time (08:00 GMT) near Sisteron.
A man, 37, was arrested trying to leave the scene in a vehicle. Some reports suggest the family was targeted for being too lightly dressed but there was no official confirmation.
A local official was quoted as saying the motive was still “very vague”.
The mother and her eldest daughter, who is believed to be 14 years old, are reported to be seriously injured, and the youngest, who is said to be eight, is in a critical condition.