Mexico has vowed it will continue to detain a North Korean freighter, an official said Monday, in the latest sign of its resolve to enforce U.N. resolutions on Pyongyang.

Mexico detained the Mu Du Bong after identifying the ship as belonging to Ocean Maritime Management, a North Korean firm blacklisted by the U.N. for illegally shipping arms.

One of the company’s ships was detained by Panamanian authorities in July 2013 for carrying Soviet-era MiG-21 fighter aircraft, surface-to-air missiles and other arms-related cargo hidden under sacks of sugar.

The 6,700-ton freighter ran aground on a reef off Tuxpan in the Mexican state of Veracruz in July 2014. Mexico held 33 crewmembers before releasing them last year.

North Korea has called for the release of the ship, saying the Mu Du Bong is a totally peaceful and legitimate commercial ship that sails under the direction of the Ministry of Land and Sea Transportation.

Still, Mexico said it "will continue to detain the ship"

according to an official who is in a position to know about government policy. He asked not to be identified, citing policy.

Mexico informed South Korea of its decision soon after the U.N. Security Council slapped North Korea with the toughest-ever sanctions on North Korea on early March.

The sanctions are meant to punish the communist country for its fourth nuclear test on Jan. 6 and long-range rocket launch on Feb. 7.

On Monday, North Korea's nuclear program and the U.N. sanctions are likely to be high on the agenda for talks between South Korean President Park Geun-hye and her Mexican counterpart, Enrique Pena Nieto.

Last week, Park held back-to-back meetings with her counterparts from the United States, China and Japan and agreed to strictly enforce the sanctions on North Korea. (Yonhap)