Two men threatened to set their dog on a pair of teenagers during a daytime mugging.
A 15 and 16-year-old were stopped by the men in Layton Road, Hounslow, at 10.45am on October 23, and told to hand over their mobile phones.
The muggers said they would unleash their Staffordshire Bull Terrier dog on them if they refused.
Both men are about 20-years-old and of slim build. One was Asian, 5ft 10ins with short black spiky hair and the other, who was walking the ginger/brown and white dog, was white, with short brown hair.
Anyone with information should call Hounslow Police Station CID on 0208 247 6160/5940 or CrimeStoppers anonymously on 0800 555111.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here