India, April 10 -- North Korea on Thursday said its testing spree this week involved various new weapons systems, including ballistic missiles armed with cluster-bomb warheads, as it pushes to expand nuclear-capable forces aimed at rival South Korea.

The report by North Korean state media came a day after South Korea's military said it detected North Korea firing multiple missiles from an eastern coastal area in its second round of launches in two days.

North Korea's official Korean Central News Agency (KCNA) said the tests lasted three days starting Monday and also included demonstrations of anti-aircraft weapons, purported electromagnetic weapons systems and carbon-fiber bombs.

South Korea's Joint Chiefs of Staff said the missiles la...