North Korea holds key meeting as US sends nuclear submarine to South Korea

Kim Jong-un attended the conference to review defence strategies and the country's struggling economy

North Korea opened a key political conference with leader Kim Jong-un in attendance to discuss improving its struggling economy and reviewing defence strategies in the face of growing tensions with rivals, according to state media reports.

The enlarged plenary meeting of the ruling Workers' party's central committee came as the US sent a nuclear-powered submarine to South Korea in the allies' latest show of force against the North, which has ramped up its testing of nuclear-capable missiles to a record pace in recent months.