More than 20 are feared dead after a school bus catches fire in suburban Bangkok

A bus carrying young students and their teachers on a school trip caught fire in suburban Bangkok on Tuesday, leaving more than 20 feared dead, officials and rescuers said.

A bus carrying young students and their teachers on a school trip caught fire in suburban Bangkok on Tuesday, leaving more than 20 feared dead, officials and rescuers said.

The bus with 45 passengers -- six teachers and 39 elementary and junior high school students -- was traveling from the central Uthai Thani province when it caught fire in Pathum Thani province, a northern suburb of Thailand's capital, acting police commissioner Kitrat Phanphet said.

The fire was first reported around noon and was put out less than an hour later, but rescuers said they could not get on board for hours as the heat inside the natural gas-fueled vehicle could have caused more explosions.

Police were still working to identify the dead but three teachers and 20 students remain unaccounted for, Kitrat said.

The cause of the blaze was not immediately known. Kitrat said the initial investigation indicates a tire had exploded and caused sparks, which ignited a blaze that spread through the bus. He did not elaborate.

No other vehicles were involved, he said.

There were discrepancies in reports on the number of the people aboard the bus. Rescuers cited teachers who survived as saying there were three buses from the school for this trip and that along the way, some students had moved to different buses than the ones they were initially on.