The case was filed accusing unidentified six people, said Officer-in-Charge of Kotwali Police Station Md Mohsin.
The miscreants also demanded Tk 50,000 as ransom, the OC said.
Sarowar, who went missing on October 29, was found beside the road in Bara Kumira area of Sitakunda on Sunday night.
The miscreants beat him up repeatedly for filing news against some influential people, Sarowar told police.
“I had several threat calls over my cellphone after the news was published.”, he said.
On October 29, Sarowar took a rented motorcycle for going to his home town from Almas Cinema area.
On the way, another youth forcefully put a helmet on Sarowar’s head and he got fainted, he added. “After that where they took me I don’t know”, he said.
Some unidentified people in an ambulance left him there and fled on Sunday night.
The ailing journo was screaming saying, “Please don’t hurt me, I won’t write any news.”
He was found at 7:45pm, half an hour later Kotwali police of Chattogram Metropolitan Police (CMP) went to the spot and took him to Chattogram Medical College Hospital, said Officer-in-Charge of Kotwali Police Station Mohammad Mohsin.
He is a staff reporter of Ajker Surjodoy and editor of News CTG.
Earlier, Assistant Editor of Ajker Surjodoy, Jubayer Siddique filed a General Diary (GD) over the matter.