A tourist bus crash in South Korea has killed 17 people and injured 14 others.

Police officer Park Sang-ho said the bus was carrying 31 people — all South Koreans in their 70s and 80s — when it veered off a mountainous road Wednesday evening and rolled about 20 yards down a hill in Gyeongju, about 174 miles southeast of Seoul.

The crash left 17 people dead and the 14 others injured seriously.

Park said the exact cause is under investigation.