The Counter-Terrorism and Transnational Crime (CTTC) unit has begun probing the origin of the Facebook post that sparked the large scale communal violence against Hindus in Brahmanbaria on Sunday.
Alimuzzaman, deputy commissioner of the CTTC unit’s cyber crime team, told the Dhaka Tribune that they have already started gathering information during the primary stages of the investigation.
Another cyber crime team under the Criminal Investigation Department (CID) is also helping with the probe, CID sources said.
The offending message, depicting Lord Shiva sitting atop the Kaaba, went up from the account of 30-year-old Rasraj Das on Friday. However, the illiterate youth stated in his latest post early on Saturday morning that he had no knowledge of how this photo originated from his account. Rasraj said he apologises to "Muslim brothers" and was only made aware of the post when his friends told him about it.
Rasraj deleted the post early Saturday.
Later that same day Rasraj was beaten up by locals and handed over to the police. On Sunday, a mob wrecked over 100 Hindu homesteads of Nasirnagar and vandalised more than a dozen temples, injuring about 100, instigated by local radical Islamist groups.
The attacks took place following a meeting of local Muslims who had gathered on Nasirnagar playground Sunday morning to demand justice for the blasphemous Facebook post.
The attack was similar to that on the Buddhist community in Cox’s Bazar in 2012, which was also sparked by a fake Facebook post.
Mizanur Rahman, superintendent of police of Brahmanbaria, told the Dhaka Tribune: “Everything will become clear after the investigation is over.”
Dr AKM Ashikur Rahman of Buet's computer science and engineering department, said people are vulnerable to Facebook hacking if they log in from shared computers.
“It is easy to verify Rasraj's claim of his account being hacked by tracking the IP from which the post was made,” Prof Rahman said. "Hackers could easily get hold of widely available software to gain access to accounts or send game requests, with malware, on Facebook which allows the hacker access to a computer if the target activates the link."
Associate Professor Zahurul Hoque Mozumder of Electrical and Electronic Engineering Department of Dhaka University, said people are more susceptible to hacking if they are careless about security as Facebook already provides robust security measures.
He said law enforcers have the expertise and technology which can easily identify the IP address of a hacker.
Another computer engineer, asking not to be named, said spyware is available on the net that can be used for hacking into person’s account.
A high official of the Police Headquarters said they have formed a four-member committee to probe the matter. Committee members are on the spot to investigate the incident and interrogate the detainees.