Pictured: Two of the hostages shot by Islamic extremist during siege at Jewish grocery store, as it emerges one shopper was executed when he grabbed one of terrorist's guns and it JAMMED

WARNING GRAPHIC CONTENT: The first pictures of two of the four hostages killed in yesterday's kosher supermarket siege in Paris have emerged. Yohan Cohen, 22, Yoav Hattab, 21, Philippe Braham, in his forties, and François-Michel Saada, believed to be in his sixties, were the four hostages killed in the attack, French Jewish organisation Crif confirmed. Pictures of Mr Hattab (inset left), a Tunisian, and Mr Cohen (left) can be revealed, 24 hours after the siege came to a climax as armed police raided the Jewish grocery. Meanwhile it was revealed that a heroic customer at the kosher supermarket in Paris snatched one of the terrorist's guns and turned it on the hostage taker - only to find it was jammed, leaving the extremist to execute him in cold blood, according to a survivor who fled the shoot-out as armed police officers and soldiers raided the store. Mickael B, as he wishes to be known, was held in the store with his three-year-old son when the fellow hostage suddenly grabbed the weapon which had been left on the counter. But, after discovering the gun had been left there because it was malfunctioning, terrorist Amedy Coulibaly shot and killed the hostage. Meanwhile footage has emerged of the moment French commandos launched flash grenades into the grocery store before hostage taker Amedy Coulibaly was gunned down last night.