[Source: BBC]

The bodies of 20 children and three teachers have been recovered after a bus transporting school pupils crashed and caught fire outside Bangkok.

The bus was returning to the Thai capital after a school trip to the north of the country.

Videos from the scene showed flames engulfing the bus as it burned under an overpass, with huge clouds of dense black smoke billowing into the sky.

The driver handed himself in to police 100km (61 miles) north of Bangkok, according to local media.

Footage taken shortly after the fatal crash showed the driver attempting to extinguish the fire but he reportedly fled the scene.

Witnesses say the bus crashed into the concrete barrier dividing the highway just north of Bangkok, after a front tyre burst.

The bus was quickly consumed by an intense fire, and many on board were unable to get out. The cause of the fire is still unknown.

Nineteen children and three teachers are reported to have survived, sixteen of whom are being treated in hospital for their injuries