A family including a ten-month-old child was killed and 15 others injured early Thursday when their bus overturned in the south central province of Ninh Thuan.
Tran Tuan Anh and his wife Dang Thi Tam, both 30 and teachers from Tay Ninh Province neighboring Ho Chi Minh City, and their daughter Na died immediately.
The bus was carrying 42 teachers from Tay Ninh heading for a summer vacation in the northern provinces. Many teachers had brought their children along.
"The bus suddenly swerved, mounted the sidewalk and then turned over completely with the four wheels on top before it came to rest on one side," said Luong Tan Trung, a teacher on the bus.
Some eyewitnesses said the driver, Phan Dinh Thanh, 30, from Ho Chi Minh City, might have run over something and braked too hard while the road was wet; it was drizzling at the time.
All the injured were rushed to Ninh Thuan General Hospital, four of them in critical condition.
Police are investigating the cause of the accident further.