North Korea denounced an agreement between Seoul and Washington to build nuclear-powered submarines, saying in a state media commentary on Tuesday that the deal would cause a "nuclear domino" effect.

South Korean President Lee Jae Myung announced the finalisation of a long-awaited security and trade agreement with the United States last week, including plans to move forward with developing atomic-powered vessels.

Seoul said it had secured "support for expanding our authority over uranium enrichment and spent-fuel reprocessing".

In its first comments responding to the deal, the nuclear-armed North fired back that the submarine programme was a "dangerous attempt at confrontation".

The agreement is a "serious development that destabilises the military security situation in the Asia-Pacifi

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