Locals first noticed it and informed police through the national emergency number 999.
Police foiled a sabotage attempt on Dhaka-Narayanganj rail line ahead of the another 48-hour blockade across the country called by BNP, Jamaat and like-minded opposition parties.
Receiving information at about 1:30am, a team of police went to Fatullah's Kotolerbagh area removed a heavy iron plate from the rail line.
Mokhlesur Rahman, sub-inspector of Narayanganj Government Railway Police, said miscreants attached a heavy iron plate to the rail line at Kotolerbagh in an attempt to derail the train.
Locals first noticed it and informed police through the national emergency number 999.
Police are trying to arrest those involved in the sabotage attempt, SI Mokhlesur Rahman added.