North Korean leader Kim Jong-un has called on the military to be ready to strike South Korea's presidential office and government bodies, reports Yonhap.

"All soldiers should be nurtured into warriors full of combat spirit and be on high alert," Kim said.

The report did not reveal when and where the drills during which the North Lorean leader made his statement took place.

Earlier on, Kim Jong-un said his country planned to conduct nuclear warhead and ballistic missile tests in a short time.

South Korean President Park ordered his government to raise the level of vigilance across the country.

It was reported earlier that the UN Security Council voted unanimously to approve tougher sanctions against North Korea on March 2. The sanctions were imposed over North Korea’s test launching of nuclear warhead missiles on January 6 and February 7 2016.