Gang used power tool to cut a hole into basement of safety deposit centre . Raided 72 security boxes before escaping with bins full of precious gems . Scotland Yard said crime had been carried out by 'Ocean 's 11 type team ' Offering £20k reward for information leading to conviction of burglars .
Gang used power tool to cut a hole into basement of safety deposit centre . Raided 72 security boxes before escaping with bins full of precious gems . Scotland Yard said crime had been carried out by 'Ocean 's 11 type team ' Offering £20,000 reward for information leading to conviction of burglars .