French police say three of the four victims killed in the Alps were shot in the head - but they still don't know the reason for the attack.

They were found in a car yesterday and are believed to be British ... while the body of a cyclist was also found close to the scene.

An 8 year old girl has been taken to hospital with gunshot wounds while a four year old was discovered alive under the bodies in the vehicle eight hours later.

Prosecutor Eric Maillaud (Pron: Mye-oh) admits until a neighbour on the campsite came forward, they had no reason to believe she existed: