Robber threatened staff at gunpoint at William Hill betting shop in Leeds
The "frightening" robbery at the William Hill bookmakers in Beeston Road, Beeston, happened at 8.10pm on Monday.
A man burst into the premises, demanding money, and threatened a member of staff with a gun.
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Hide AdThe worker managed to lock themselves in another room, where they called police.
Then the robber fled the scene empty-handed.
Detective Inspector Amanda Wimbles of Leeds CID, said: "This was a very frightening incident and I would like to appeal directly to any witnesses to come forward." 
Any witnesses to the incident are asked to call police on 101 quoting log 1672 of Monday March 20.