Four passengers travelling on a crowded suburban train in Chennai died on Tuesday after they hit iron poles while allegedly standing on the footboard, ANI reported. They fell off the train at St Thomas Mount station.

Some passengers were injured in the accident too and were taken to hospital in a critical condition. Reports said the number of injured passengers was at least 10.

“When the train was arriving at St Thomas Mount, 10 passengers were hanging out of the door,” a railways official told The News Minute. “They seem to have hit a wall or a pole and fallen down. The train was extremely crowded.”

The station is located on the busy Chennai Beach-Chengalpattu section of the suburban railway network. The incident took place during the morning rush hour.