British rocker Drew Mcconnell is urging fans to keep cell phones safe at concerts after a recent spate of thefts during gigs in the U.K.

Police have launched inquiries amid fears specialist gangs of crooks are posing as music lovers to attend packed concerts and mingle with fans before stealing their phones.

Almost 40 devices were taken during a Kasabian show in Plymouth, England earlier this year (13), 20 went missing during a gig by The Vaccines in Bridlington, England, and 126 fans of rapper Example fell victim to phone theft at his concert in Bournemouth, England in February (13).

Now Babyshambles bassist MCConnell is warning fans to make sure their smartphone is hidden out of sight after learning that 50 devices were stolen from audience members at the band's show in Cambridge, England last month (Oct13).

He tells NME magazine, "Appealing to the kind of people who would rob skint (broke) music fans is pointless, but I urge gig-goers to keep their phones safe. Remember, that phone in your pocket is a £500 mini computer."