Arsonists set three coaches of Mohanganj Express on fire near Tejgaon Railway Station in Dhaka early today, killing a woman, her three-year-old son and two other people yet to be identified.

"The train left Mohanganj Station in Netrokona around 11:00pm last night and reached the airport station around 4:50am. The train was supposed to go directly to Kamalapur Railway Station and the green signal was given for it,' Parbat Ali, the on-duty station master at Tejgaon Railway Station, told The Daily Star.

Photo 1/5

Law enforcers are inspecting inside the train. Photo: Sheikh Enam/Star

"But I saw smoke coming out from the compartment of the train when it reached Tejgaon station around 4:58," said Parbat. "Then, I immediately turned the emergency switch on to make the train stop. Seeing the red light, the driver stopped the train but it had already reached the railway gate by then."

Photo 2/5

A view inside the burned compartment. Photo: Sheikh Enam/Star

The fire engulfed compartments Chha, Ja, and Jha of the train. Three firefighting units rushed to the scene and doused the fire around 6:45am.

Photo 3/5

A view from outside of the train. Photo: Sheikh Enam/Star

Police suspected that the arsonists, who set three bogies of the train on fire, boarded the train from the Airport Railway Station.

Photo 4/5

Law enforcers are inspecting inside the train. Photo: Sheikh Enam/Star

"The primary findings prove that it is an act of sabotage," Md Mizanur Rahman, superintendent of police of Police Bureau of Investigation, told The Daily Star.

Photo 5/5

A view from outside of the train. Photo: Sheikh Enam/Star