HARBIN - Four people were killed and another one severely injured after their jeep rolled off a road in northeastern China's Heilongjiang province on Friday, local authorities said.

The jeep, with five people on board, rolled off a road in suburban Wuchang, a city administered by the provincial capital Harbin, early Friday morning, said an official with Harbin's emergency response office.

Police are still investigating the cause of the tragedy, said the official.