A man was found dead at a brick kiln in Puthia upazila of Rajshahi on Tuesday.
The deceased was identified as Nurul Islam, 55, former president of Puthia upazila unit of Road Transport Workers' Union.
Locals spotted his body around 11:15am and informed police, said Shakil Uddin Ahmed, officer-in-charge of Puthia Police Station.
The cause of Nurul's death is still unclear, said the OC.
As news of his death spread, agitated transport workers blocked the Rajshahi-Dhaka Highway, halting vehicular movement for about half an hour, reports UNB.