The naval advancement program ramped up days after South Korea fired warning shots at troops from the North who breached the demarcation line.

Satellite images have for the first time shown the extent of a shipyard accident in North Korea that damaged a new warship in the presence of the secretive state's leader, Kim Jong Un.

Dozens of people were injured during a protest outside Argentina's Congress on Wednesday where activists and retired Argentines demanded higher pensions, according to Reuters witnesses.