Paris supermarket siege end 'very shocking' says eyewitness

An eyewitness to the storming of a a supermarket in eastern Paris, Alexis, has described the moment a hostage fled and police started firing.

The gunman and four hostages died.

It is not clear whether they were killed before or after the police assault on Hyper Cacher supermarket, near Porte de Vincennes, began.

The gunman at the supermarket is believed to be linked to two suspects thought to have killed 12 people at the offices of Charlie Hebdo magazine on Wednesday.