A small Macau bank accused by the US of money laundering and distribution is accused of providing L/Cs to North Korean clients. The bank in question, Banco Delta Asia (BDA), denies allegations of wrongdoing in respect of its business with North Korean clients and banks. In March 2007, the US Treasury Department ordered all US banks and companies to sever ties with BDA following an 18-month investigation. BDA plans to challenge this ruling. The US Treasury blacklisted BDA in June 2005, labelling it a "weapons of mass destruction proliferator and supporter".