Transport Minister William ole Ntimama told parliament that the driver had been going downhill too fast, and had not properly applied the air brakes that reduce the train's speed.

The driver has been arrested and is facing criminal charges.

The train was travelling from Nairobi to Mombassa

The train jumped the tracks inside Kenya's Tsavo National Park on 24 March as it travelled from the capital Nairobi to the port city of Mombasa.

Mr Ntimama said the train derailed at 93 kph (58 mph) on a section of track where it should have been doing 50 kph (31 mph).

Several tourists who were travelling on the train said it appeared to be racing out of control in the minutes before it derailed.

As well as the 32 people killed, more than 100 were injured.

Mr Ntimama said the investigation into the crash showed the engine had been properly maintained and was not overloaded.

Crew members had initially said the train's brakes failed.