The U.S. Treasury Department has announced sanctions on a North Korean bank that is allegedly involved in Pyongyang’s nuclear and weapons trade.

The Korea Kwangson Banking Corporation, which has a branch office in Dandong, China, is reportedly a channel personally managed by North Korean leader Kim Jong-il to store slush funds.

The department said in a statement Tuesday that the Korea Kwangswon Banking Corporation was designated under Executive Order 13382 for providing services to Tanchon Commercial Bank and Korea Hyoksin Trading Corporation, a subordinate of the Korea Ryonbong General Corporation.

Hyoksin was one of five corporate entities sanctioned by U.N. resolution 1874 for aiding in the proliferation of weapons of mass destruction.

Executive Order 13382 freezes the assets of proliferators of weapons of mass destruction and their supporters and prohibits U.S. persons from engaging in transactions with them, thereby isolating them from the U.S. financial and commercial systems.