Thieves used a large drill to break into a Sparkasse savings bank in Gelsenkirchen, western Germany. They stole an estimated €30 million (£26 million; $35 million) in cash, gold, and jewellery. Police called the heist "very professionally executed," comparing it to the Hollywood film Ocean's Eleven. The criminals broke open over 3,000 safe deposit boxes during the robbery. Authorities found out about the crime when a fire alarm was triggered early Monday morning. Police say the thieves took advantage of quiet Christmas days to steal from the bank on Nienhofstrasse in the Buer district. They likely entered and escaped through a nearby parking garage. Witnesses saw several men carrying large bags in the garage stairwell overnight from Saturday to Sunday. Video footage shows a black Audi RS 6 leaving the garage early Monday. Police and fire crews found a hole into the underground vault room after the fire alarm. Sparkasse customers were told to contact the bank, which set up a hotline. Police secured the bank entrance on Tuesday after many customers gathered for information. The bank announced the branch would stay closed on Tuesday after the break-in. Sparkasse said 95% of safe deposit boxes were forced open, making it very likely many customers were affected. Each box's contents are insured up to €10,300, and customers were advised to check if their home insurance offers extra coverage.