Two people have been killed and six more injured after a truck trailer fell onto a minibus along National Road 4 in Preah Sihanouk province on Saturday.

The accident occurred at around 2pm in Prey Nob district, about 7 kilometres outside provincial capital Sihanoukville, from where the minibus had set off for Phnom Penh shortly beforehand.

The truck had been heading in the opposite direction, with Prey Nob district police chief Seng Chamroeun suggesting the driver was speeding and attempting to overtake at the time of the accident.

“It had to avoid the minibus which came in the opposite direction. The truck trailer detached from the truck and collapsed onto the minibus, leaving it severely damaged,” he said.

Chamroeun said the injured passengers from the minibus were sent to the provincial hospital, while the truck driver escaped the incident unscathed and fled the scene.

“We will track him down through the company that owns the truck trailer, so it will not be difficult,” he said.

Last week, Interior Ministry official Run Rath Veasna said more than 1,800 people had already been killed in 2015 – an almost 4 per cent increase from the same period last year.