The Rapid Action Battalion (RAB) has arrested the mastermind behind the attack on Hindu community in Rangpur's Pirganj.
Members of the elite force nabbed Saikat Mandal, one of the masterminds of the attack, and his associate, Robiul Islam, during a drive in Tongi, Gazipur.
"Details about the arrest will be briefed at around 11:30am on Saturday morning at the RAB media centre in the capital's Karwan Bazar," said ANM Imran Uddin Khan, assistant director of RAB's media wing, on Friday night.
On 17 October, Paritosh of Bara Karimpur Majhipara village under Pirganj upazila reportedly uploaded an insulting picture of the Holy Kaaba Sharif on Facebook which went viral on social media.
Later, a mob rampaged through his village and burned down many houses. Over 60 families were affected during the attack.
Victims claimed that 135 houses were vandalised and 18 houses were set on fire on the day of the incident. Cattle and jewellery were looted. Furniture including houses has been damaged.
Police have arrested at least 56 people so far in connection with the attack.
Paritosh Roy, whose alleged Facebook post triggered the attack, was also arrested from neighbouring district Joypurhat three days ago.