Experts say North Korea could increase its weapons testing after the arrival of a US aircraft carrier last week. View on euronews

North Korean leader Kim Jong Un's influential sister said Tuesday that the deployment of a U.S. aircraft carrier to South Korea would prompt Pyongyang to bolster its nuclear arsenal and ramp up military provocations.

North Korean leader Kim Jong-un visited Kim Il Sung University of Politics on the 80th anniversary of its founding, stressing that "arms without ideology are little short of ironware," according to North's state media on Tuesday.