Family members of Mubashar Hasan suspect his disappearance might be linked to his research and writing.
They find no other reasons for mysterious disappearance of the North South University teacher.
"I still think Mubashar has disappeared because of the different views in his writing and research," one of Mubashar's relatives told Prothom Alo.
Mubashar worked for a project of Resolve Network, initiated by the Institute of Peace, USA.
Two persons who worked for the project said that researchers worked on democracy, political violence, communalism, religion, and secularism for the project. Mubashar was a fellow member of the project.
Mubashar was writing on 'The Language of Youth Politics in Bangladesh: Beyond the Secular Religion Binary' for the project and he presented the paper in Washington DC.
Mubashar Hasan, an assistant professor of School of Humanities and Social Sciences at NSU, has been missing since Tuesday. A missing diary has been filed in this connection.
But, law enforcers including police and Rapid Action Battalion (RAB) are yet to trace him.
RAB-3 captain Lt Col Emranul Hasan told Prothom Alo that there was no progress in tracing Mubashar's whereabouts as yet. Officer-in-charge of Khilgaon police station, Moshiur Rahman said the same, too.
Dhaka University's Mass Communication and Journalism (MCJ) department was expected to form a human chain on the campus Sunday, demanding that Mubashar Hasan be traced.
Despite his being missing, Mubashar's Facebook and Messenger accounts were found running. Some of his friends said Mubashar could be traced by the IP address that logs into to use his accounts.
Like Mubashar, more than 10 people went missing mysteriously in the past few months.
Those who went missing include Bangladesh Kalyan Party secretary general Aminur Rahman, honorary consul of Belarus and businessman Aniruddha Kumar Roy, McGill University student Ishrak Ahmed, journalist Utpal Das, and BNP leader and ABN Group managing director Syed Sadat Ahmed.