A group of masked men tied up a businessman in an office here and took off with a safe containing cash worth 15 million rubles ($515,000), police said Thursday.

The men broke into the office near Taganskaya subway station at about 8 p.m. local time (1600 GMT) Wednesday, tied up the businessman and demanded that the safe be opened. When he refused, the thieves took the safe and fled the scene, they said.