Four RU teachers threatened to death

Our man was injured in crossfire with police at Savar EPZ. Now he is under the treatment in Khidirpur of Kolkata. It needs 14 lakhs taka to keep forward his treatment. We have 10 lakhs taka and you will have to give rest of the money needed.
Saying above the talk a man identifying himself as Subroto Byn has demanded 4 lakhs taka from me via an Indian telephone (918017822725) at 12.00pm on October 11, said the Victim, Professor Dr. Mizanur Rahman a teacher of Rajshahi University (RU).
The same call from the same person came to the other 3 teachers of the university while they were threatened to life if the demand is not met.
The threatened teachers are Professor Amrita lal Bala, Professor Mizanur Rahman Khan, Professor Shafiq-un-nobi Samadi and Professor Shamsur Nahar.
Officer in charge (OC) of Motihar Police station Humayan Kabir said that, Mizanur Rahman and Shamsur Rahman filed a General Diary (GD) with Moyihar Police Station.
The threat has come from an Indian number that leads the fact to the complexity. We are investigating the matter, he added.
Subro Bai addressed himself as a top terrorist of former caretaker government.-RU Correspondent