A high school reunion trip in Vietnam took a fatal turn on Sunday when a bus carrying the alumni crashed and flipped over at a bend on the highway, killing more than a dozen passengers.

The nearly 40 passengers on the bus were classmates from Dong Hoi High School who were traveling to visit the area in central Quang Binh Province for the 30th anniversary of their graduation. 

But the driver lost control on a sharp turn on the highway, said state media in a statement.

At least 13 people were killed, and many more injured.

"People on the coach said that when the coach was travelling down the slope, there were signs the brakes were broken," according to a report by Tuoi Tre newspaper.

AFP