New Zealand police raided the homes of two men who lead the NZ-DPRK Society on Monday as part of an investigation into alleged violations of U.N. sanctions against North Korea.

The two individuals under investigation are a former humanitarian worker named Peter Wilson, secretary at the NZ-DPRK Society, and an unnamed Presbyterian minister.

Matt Robson, the lawyer representing both suspects, told NK News that the raid stems from a $2,000 USD transaction sent as a donation from their organization’s bank account to a third person in Indonesia, who withdrew the cash and took it to the DPRK Embassy in Jakarta.