At least 22 people have been killed and another 79 are injured after a crane collapsed onto a train in Thailand.

It is believed a train travelling north from Bangkok was derailed when a construction crane fell onto a carriage as it was passing through Ban Thanon Khot in Nakhon Ratchasima.

A further seven people are feared dead after a car caught fire nearby.

This photo released from State Railway of Thailand, shows a scene after a construction crane fell into a passenger train in Nakhon Ratchasima. (AP)

The State Railway of Thailand confirmed 195 people were travelling on the train when the crane fell.

The accident occurred about 9am local time (approx. 1pm AEDT) when a crane being used in the construction of a high-speed rail bridge fell onto a train.

Some of the passengers were school students, according to authorities.

Rescue operations are under way.

At least 22 people have been killed and another 79 are injured, local police said. (AP)

The State Railway said there would be a “thorough” investigation into how the incident occurred.