SEOUL, South Korea — The United States Navy intercepted a North Korean ship it suspected of carrying missile technology to Myanmar two weeks ago and, after a standoff at sea and several days of diplomatic pressure from Washington and Asia nations, forced the vessel to return home, according to several senior American officials.

Washington made no announcement about the operation, which paralleled a similar, far more public confrontation with North Korea two years ago. But in response to questions about what appears to be a growing trade in missiles and missile parts between North Korea and Myanmar — two of the world’s most isolated governments — American officials have described the episode as an example of how they can use a combination of naval power and diplomatic pressure to enforce United Nations sanctions imposed after the North’s last nuclear test, in 2009.

It was a rare victory: a similar shipment of suspected missile parts made it to Myanmar last year before American officials could act. Despite the Obama administration’s efforts to squeeze North Korea with both economic and trade sanctions, there are continuing reports of sophisticated missile technology exchanges, some of it by air, between North Korea and Iran, among other nations.

North Korea, aware that shipments leaving the country are under increased scrutiny, has found a profitable trading partner in the authoritarian government in Myanmar.