Plaeng Yao police arrived on the scene off Kabin Buri-Sattahip Road in Moo 10, Tambon Hua Samrong, at 2.30am.
They found four Cambodians. Rescue workers pulled the pickup out of the water and the bodies of two men and a woman were found inside.
The body of another man was discovered in the canal.
The survivors told police that 21 undocumented Cambodians were being smuggled by a Thai driver and two other Thais from Sa Kaew to Samut Prakan.
Six of the migrants had been riding in the cab and 12 more in the back.
They said the truck had just crossed from Prachin Buri into Chachoengsao when a Highway Police car gave chase. The driver lost control on the dark and narrow village road.
Published : December 15, 2017
By : The Nation