School bus fire in Thailand leaves at least 23 dead

At least 23 people have died in Thailand after a school bus carrying more than 40 students and teachers on a field trip caught fire in the outskirts of the capital Bangkok.

An investigation on the causes is underway with 16 and three teachers also sent to a hospital for treatment, Transport Minister Suriya Juangroongruangkit said.

Images posted on social media and carried by local news outlets showed thick grey smoke pouring out of the bus, parts of which were still on fire.

The blaze was later extinguished.

A photographer saw fire trucks, police and rescue vehicles parked around the blackened vehicle, with a cluster of firefighters at the entrance.

"Teachers told us that the fire ignited very quickly," acting police chief Kittirat Phanphet told a press conference.

"From speaking to witnesses, we believe the explosion was caused by a spark from the tyre that lit the gas cylinder that was powering the vehicle," he said, adding that some students escaped through the window.

The bus was a natural gas vehicle (NGV), according to Transport Minister Suriya.

Prime Minister Paetongtarn Shinawatra said the students were on a field trip from the province of Uthai Thani, about 250km north of the capital.

"As a mother, I would like to express my deepest condolences to the families," she said in a social media post on X