Robbers in Germany drilled a large hole in the wall of a basement bank vault and stole tens of millions of dollars’ worth of valuables, police in the northwestern city of Gelsenkirchen said Tuesday.

The thieves are on the run, local police said, urging those with tips to come forward. They “used the quiet of the Christmas holidays” to drill into the bank’s safe room, police said, carving out a large, clean-cut hole through what appears to be layers of thick concrete and masonry. Photos of the safe room show piles of objects, including documents tossed about.