Two well-dress thieves walked into a London Bond Street jewelry store last week and, after brandishing handguns at shop workers, made off with $65 million worth of gems in one of Britain's biggest jewelry heists, police said Tuesday.

Security camera footage released by Scotland Yard shows two men in crisp suits entering Graff Diamonds' flagship store on Thursday afternoon.

The men stole dozens of high-end rings, bracelets, necklaces and watches worth 40 million pounds, or $65 million, and fired two gunshots into the ground before escaping using a series of getaway cars, police said. No one was hurt.

British media, including the BBC and several London newspapers, called it the biggest jewel heist in British history, after a 2003 heist that cost the same store 23 million pounds.

Police could only confirm it was among the biggest.

Graff Diamonds declined to give details beyond the police statement.