At least six people were killed when a bus slammed into five motorbikes on National Highway 21A in the northern province of Nam Dinh on Monday, Vietnamnet reported.
At around 10 a.m. the 40-seat bus was traveling on the highway when a motorbike driven by a young man suddenly crossed the road.
To avoid the motorbike, the 32-year-old bus driver, identified only as Tuan, swerved into oncoming traffic, striking five other motorbikes traveling in the opposite direction.
Luu Quang Vu, 23, and Nguyen Van Quynh, 41, died on the spot.
Four others, whose identities have not been released, died after being rushed to hospital. A seventh motorist also sustained injuries.
The five motorbikes were smashed to pieces, one of them ending up several dozen meters from the scene of the collision.
The accident caused a two-hour traffic jam on the highway. Police said the victims were all en route to Hanoi after spending National Day (September 2) in their hometowns.
Tuan is being held in police custody as they continue to conduct their investigation.