The vessel, The Light, was Sunday reported to have returned to North Korea after drifting in international waters.
Gary Samore, the special assistant to President Barack Obama for arms control and weapons of mass destruction, said the US suspected that the vessel was heading to Burma to deliver military equipment such as small arms and missile-related items, according to the report.
"We talked directly to the North Koreans. We talked directly to all the Southeast Asian countries, including Myanmar [Burma], urging them to inspect the ship if it called into their port," Samore said. “The US Navy also contacted the North Korean ship as it was sailing to ask them where they were going and what cargo they were carrying."
North Korea has been accused of repeatedly flouting international sanctions to deliver arms and possibly nuclear material to other pariah states, such as Burma and Iran.