At least four people including a child were killed as arsonists set fire to the Dhaka-bound Mohanganj Express train in the capital's Tejgaon Railway station area early today. 

Three carriages of the train were set on fire around 5:04 am, confirmed by Shahjahan Sikder, deputy assistant director of Fire Service and Civil Defence headquarters media cell. 

On information, three firefighting units from Tejgaon Fire Station rushed to the spot and tame the blaze around 6:45 am, he said. 

They recovered the bodies of the victims from one of the compartments, added the officer. 

Of the deceased, two were identified as Nadira Akhter Popy, 35, and her three-year-old son, Yasin, said Inspector Bachhu Mia, in charge of the DMCH police camp.