The condition of National Professor Anisuzzaman, who is now undergoing treatment at Combined Military Hospital (CMH) in Dhaka, remained unchanged till Sunday night.
Professor Anisuzzaman was shifted to the CMH from another hospital in the city on Saturday after his health condition deteriorated, his son Ananda Jaman told The Business Standard, adding, "The condition could be critical any time."
"Doctors here have been trying, but medicines are not working on him properly," he added.
Prof Dr Anisuzzana was admitted to the Universal Cardiac Hospital in the city on April 29 with various health complications. As his condition deteriorated, he was taken to the Intensive Care Unit of the hospital on May 2.
Anisuzzaman is an eminent educator, writer and Emeritus Professor of Bangla Language and Literature Department at Dhaka University.
Anisuzzaman participated in the Language Movement, the 1969 mass upsurge and the Liberation War. After independence, he became a member of the National Education Commission with Kudrat-E-Khuda as its chief.