Government Railway Police (GRP) recovered the body of Ibn Reza Fagun, 20, son of Kakon Reza, former general secretary of Sherpur Press Club.
Fagun left online news portal priyo.com in April as a sub-editor for joining another news portal, said family members.
They said Fagun boarded a Sherpur-bound bus at Mohakhali in the capital on Tuesday evening. He talked to his father around 8pm but later his phone was found switched off.
On Wednesday noon, his body was found by the rail tracks at Nandina Ranagachha Madhyapara in Sadar upazila of Jamalpur.
Officer-in-charge of Jamalpur GRP Station Tapos Kumar Pundit said the body was handed over to the family after autopsy.
The body bore several injury marks, he said, adding that miscreants might have beaten the journalist to death and dumped the body by the rail tracks.