US federal prosecutors have accused a Chinese illegal migrant of exporting guns and ammunition to North Korea, which funneled him $2 million to purchase the equipment, according to newly unsealed court documents.

Shenghua Wen also admitted he had attempted to purchase military uniforms, which prosecutors said was part of an apparent attempt to disguise North Koreans so they could conduct a “surprise attack” against South Korea.

The complaint, filed Nov. 26, alleged that Wen “successfully exported at least two shipments of firearms and ammunition to North Korea by concealing the items inside shipping containers that were shipped from Long Beach, California, through Hong Kong, China, to North Korea.”

He is charged with conspiring to violate American sanctions on North Korea that ban sending US dollars or goods to the country without permission.