A Russian company is facing charges of operating a gambling room in the North Korean embassy in Moscow.

The company, which leased the second and third floor of the embassy’s administrative building, has allegedly been running the illegal operation since December.

The North Korean embassy denied the allegations when reports surfaced last week. But signs of a gambling operation were detected in a recent investigation by the Russian Foreign Ministry.

The Russian Foreign Ministry issued letters of protest to ambassadors from North Korea and Belarus and demanded the casino immediately shutdown to prevent further violation of Russian law and bilateral agreements.