CHACHOENGSAO: Four migrant workers were killed in a crash following a police chase in this eastern province in the early hours of Friday.

Plaeng Yao district police received reports of the incident at 2.30am.

While trying to escape highway police, the driver of a pickup truck carrying 21 migrant workers took a narrow soi and plunged the truck into a ditch.

Police found an overturned white Toyota pickup truck with a Sa Kaeo licence plate in the roadside ditch. It apparently fell from the road which was 2-3m high.

There were signs some people inside had escaped.

After lifting the truck from the ditch, police found the bodies of two men and one woman inside the cab. Another man was also found dead outside the truck. All of them were later identified as Cambodians. 

The survivors said the Thai driver was picking up 21 Cambodian migrant workers from Sa Kaeo to work at a construction site in Samut Prakan province.

Two more Thais sat in the front seat while nine of the Cambodians crammed in the cab and the remaining 12 were travelling in the bed.