North Korea vows to execute former South Korean president

North Korea has vowed to execute South Korea's former president and her spy director, accusing them of planning to assassinate its supreme leadership.

The official Korean Central News Agency said on Wednesday that North Korea will impose a "death penalty" on ousted South Korean president Park Geun-hye and former spy chief Lee Byoung Ho, and they could receive a "miserable dog's death any time, at any place and by whatever methods from this moment".