The two trains were heading in opposite directions on the same track when they collided at 3 a.m. local time. Most passengers were asleep when the crash occurred.
Two trains have collided in eastern Bangladesh, leaving at least 15 dead and injuring dozens. Emergency personnel were on the scene to rescue passengers who were trapped in wreckage.
"So far, 15 bodies have been recovered," district official Hayat Ud Dowlah Khan told Reuters on Tuesday, warning that the death toll would likely rise.
"More than 40 injured people have been admitted in hospitals," he said.
Both trains on same track
The accident took place at around 3 a.m. local time (9 p.m. UTC) in Brahmanbaria, some 100 kilometers (60 miles) east of the capital, Dhaka, when a train headed for the capital crashed into another bound for the southern city of Chittagong, crumpling three compartments.
Most passengers were asleep when the crash occurred.
It remained unclear what caused the two trains to run on the same track. Authorities have launched a formal investigation.
"One of the trains might have broken the signal, leading to the tragedy," one police official, Shayamal Kanti Das, told reporters.
Firefighters, police, border guards and army officials were all at the scene to assist with the rescue operation.
Train accidents are a frequent occurrence in Bangladesh. Unsupervised railway crossings, poor signaling and poor track conditions have been some of the causes of previous accidents.