Cops are yet to find the whereabouts of Prof. Mubashar Hasan, a teacher of North South University (NSU), who went missing last Tuesday.

Md Mashiur, officer-in-charge of Khilgaon police station, said there has been no new development in the case.

Tamanna Tasmim, younger sister of Mubashar, said: "Law enforcers are yet to  give us any news of my brother. We're feeling helpless and clueless.”

She also said Mubashar was not involved in politics. She further said that she could not think of anyone willing to cause harm to her brother.

The missing teacher's family members have already sought Prime Minister Shiekh Hasina’s intervention to find Mubashar as soon as possible.

Tamanna Tasnim confirmed that her brother was worried about his own security and installed CC cameras at his home. "However, it could be a coincidence and may not be linked to his disappearance," she said.

On Sunday, home minister Asaduzzaman Khan said that law enforcement  agencies have been working round the clock to trace those persons who had gone missing in the past.

The minister's comment came at a time when a sense of fear has gripped the people after mysterious disappearance of a businessman, a private university teacher and a journalist from Dhaka since October 10.

At a public programme in Mirpur, the home minister said: “We'll need more time to detect the reason behind the disappearance. Our intelligence agencies have been working hard to this end.”

He requested media outlets to not portray the failure as negligence.

Meanwhile, a social media post of Mubashar’s ex-wife has gone viral. The post was about a letter. In the letter, she and her daughter said they were keenly waiting for the missing teacher to return.

Earlier, on November 13, teachers and students of Dhaka University (DU) demanded that the government should find Mubashar Hasan within 72 hours. They warned that they would go on hunger strike if their demand is not met.

Mubashar Hasan, an assistant professor at the School of Arts and Social Sciences, joined NSU in September last year after a brief stint at the media studies and journalism department of the University of Liberal Arts Bangladesh (ULAB).

He has been working on counter-violent extremism for a long time. He was the founder and CEO of an online portal, Alochonaa.com (Dialogue). He completed his PhD from Griffith University in Australia. He obtained his graduation from Dhaka University in mass communication and journalism.

After that he returned to Bangladesh and joined Oxfam as a public relations and communications specialist.

Recently, Mubashar was involved in research work on the spread of militancy in society. He was associated with a research project on religion and politics in Bangladesh. He mentioned in his last article how Islam is spreading  political and extremist violence within Bangladesh.

Mubashar left his job at Oxfam a few years later to pursue a Phd in political science and government at Griffith University, where he published his thesis titled “Geopolitics of Political Islam in Bangladesh.”

He also worked as a journalist for IRIN News and bdnews24.com, in addition to brief stints at the BBC World Service Trust and the Practical Action and Global Development Network in Bangladesh and the United Kingdom.

He also worked as an adviser for the Bangladesh government.