A man was attacked by a Rotweiler and then had a gun pointed at him by three men who stole his iPod.
The robbery happened at around 6pm yesterday in a footpath close to Sundon Park Road in Luton.
The victim, 33, was approached by the men who asked if had a cigarette.
The offender then set his dog on the victim, before pulling a handgun from the waist of his trousers.
The victim handed over his iPod and the offenders fled.
Anyone with information is asked to call DC Godfree on 101.