(ECNS) -- Six people were killed and 11 others injured after a van carrying 17 people plunged off a cliff in southwest China's Sichuan Province late Wednesday, local authorities said.

The vehicle fell off an elevated road while traveling from Baoxing County in Ya'an City to Kangding, a county-level city in the Garze Tibetan Autonomous Prefecture.

An investigation into the accident is underway.