Police in Luton have released CCTV pictures of two men they want to trace after an attempted robbery at a newsagent's where a gunshot was fired.
The incident happened on May 7 in Premier News at about 7.15am when two men visited the shop; one stood by the door while the other entered, armed with a hand gun.
A shot was fired before both men left the scene empty handed, running towards Whitehaven.
The first man is described as wearing black clothing and a black balaclava; the second wore a grey tracksuit and was carrying a florescent drawstring bag.
Detective Constable Rebecca Kitts, investigating has released the CCTV and pictures in a hope that members of the public will come forward and help identify the men involved.