Dhaka, Jan. 9 -- Four people were killed and 15 others injured as a gas cylinder in an ambulance exploded following a collision with a bus in Savar on the Dhaka-Aricha highway early Thursday.

Savar Highway Police Station Officer-in-Charge (OC) Sougatul Alam said the ambulance caught fire around 2 am after being hit by a bus in front of Rajfulbaria Police Town and the blaze engulfed two buses, as per a UNB report.

"Four passengers of the ambulance died and the bodies could not be identified as those were fully burnt," he said.

The injured were rescued and admitted to a hospital for treatment. Police said the death toll may rise further.

The fire service officials said that the fire broke out due to the explosion of a gas cylinder in th...