French police have revealed that Amedy Coulibaly, the jihadi who attacked Hyper Cacher supermarket in Paris in January, filmed three of the four murders he committed in the store.

Investigators found footage of the killings on computers that Coulibaly had tried to use to post the video online or send it to a contact.

Coulibaly had attached to his torso a Go-Pro camera, used in extreme sports, and started filming as soon as he entered the store.

Coulibaly tried to send the video from the computer he brought with him, but when he realised he could not connect to the internet, he used another computer he found at the store, forcing a customer to help him upload the footage.

Community website Dreuz.info claimed that a map showing Jewish schools in the Paris area had been found in the boot of Coulibaly's car.