Former Prime Minister Lee Hae-chan has died while on a business trip to Vietnam. 

He was 73.
 
According to the Peaceful Unification Advisory Council, Lee was pronounced dead at a hospital in Ho Chi Minh City at 2:48 p.m. Sunday after suffering cardiac arrest.

The council said Lee, who was serving as a senior vice president of the council, arrived in Ho Chi Minh City on Thursday to attend its Asia-Pacific regional meeting.

Lee collapsed on Friday after experiencing breathing difficulties.

He reportedly received cardiopulmonary resuscitation as he was being taken to the emergency room.

A seven-term liberal lawmaker, Lee served as education minister during the Kim Dae-jung administration and as prime minister during the Roh Moo-hyun administration.