Police arrested a man on Monday night for spreading rumour on Facebook over the Bhola incident.
The arrestee - Md Robiul Alam is an employee of a shipping agency in Chattogram.
Police arrested him from a hotel of port city's Laldighi area at around 11:30pm.
"Robiul spread propaganda by giving a status from his Facebook account that the fire was shot on Muslim Tawhidi Janata members in Bhola upon Chattogram Metropolitan Police Commissioner Mahbubur Rahman's instruction," Officer-in-Charge of Kotwali Police Station Mohammad Mohsin said.
Through the post, he tried to destabilise the situation, Mohsin added.
Rabiul also spread false information on Facebook that the police have surrounded Hathazari Madrasa and shut down power connection.
In the same post, he urged everyone to prepare for Jihad.
A case was filed against him with Kotwali Police Station under Digital Security Act, said the OC.
He will be produced before the court on Tuesday noon.