SEOUL, Feb. 21 (Yonhap) -- Four South Koreans were killed and two others were critically injured in Laos Sunday when their mini-bus collided head-on with a bus, Seoul's Foreign Ministry said.

The accident took place in the Kasi area north of Vientiane, leaving the Laotian driver dead as well.

The mini-bus was carrying six South Koreans. Three women and one man, all in their 50s or 60s, are dead, the ministry said. A man and a woman with similar ages were injured.

They were among a group of South Korean Buddhists visiting Laos to deliver medical aid, according to the Jogye Order of Korean Buddhism

They were heading to the popular tourist spot of Luang Prabang at the time of the calamity.

The South Korean Embassy in Laos immediately dispatched a consul to the accident site.

The government plans to provide all necessary consular services including assistance for those injured and funerals and the entry of bereaved families into the Southeast Asian nation, said the ministry.

Source: News Agency