German police responded to a hostage takeover at a bank in a wealthy Berlin suburb. They negotiated with mastermind Khaled Al Bazari for more than 15 hours before delivering $4 million in ransom money.

What the police did not realise was that Bazari and his team had spent the previous 16 months painstakingly digging a tunnel by hand from their headquarters to the bank.

Using skateboards to haul $11 million in cash and jewels through the tunnel, the gang pulled off a heist for the ages.