BANGKOK, March 17 (Xinhua) -- Three Myanmar migrant workers were killed and nine others injured in a road accident in central Thailand in the wee hour of Saturday, police said.

The three Myanmar migrant workers were killed in a blaze which immediately occurred after the speeding van they were riding rammed into the side of an 18-wheel truck on Asia Highway in Sing Buri province, about 150 kilometers north of Bangkok, at about 02:30 a.m. local time on Saturday.

While those Myanmar workers who sat on the front seats were apparently killed in the fire, the nine others who sat on the back seats were injured and managed to get off from the burning van, the police said. They were rushed to hospital alongside the Thai driver.

The migrant workers had been picked up from Bangkok and were on their way to Chiang Rai province in northern Thailand where they would have their visa extended or cross the border into their home country.

The police were investigating the cause of the fatal accident on the interprovincial highway where many vehicles would usually speed at night.