North Korea has been scheming to trade goods restricted by U.N. sanctions via Russia at a time when countries have strengthened measures to squeeze trade with Pyongyang to halt its missile and nuclear programs, sources close to the matter said Sunday.

Pyongyang has allegedly falsified documents and disguised its trade with Russia as that between Russia and China as a way to continue international trade of goods, including textiles and gasoline that are banned or restricted under sanctions imposed by a U.N. Security Council resolution.

A bill of landing of the North Korean cargo and passenger boat Mangyongbong that arrived at Vladivostok in the Russian Far East from Rason in northeastern North Korea in mid-October said a Russian company in Cheboksary, central Russia, imported 5 tons of North Korean-made garments via Vladivostok from a North Korean trade company.