North Korea says it has successfully tested Zam-2.0, an AI-powered guided torpedo. The trial underscores Pyongyang's growing naval focus despite doubts over its digital capabilities.

The announcement came days after Pyongyang said it had test-fired two types of cruise missiles from a submarine after weeks of friction with Seoul over a landmine explosion along their border.

The announcement came days after Pyongyang said it had test-fired two types of cruise missiles from a submarine after weeks of friction with Seoul over a landmine explosion along their border.

North Korea says it has tested a new torpedo system that uses artificial intelligence for target detection and guidance.