BNP Commercial Affairs Secretary and former lawmaker Salahuddin Ahmed is currently in the intensive care unit (ICU) of Bangabandhu Sheikh Mujib Medical University (BSMMU) Hospital.
"He was moved from the coronary care unit (CCU) to the ICU around 2am today (21 November). His blood pressure is rapidly dropping," said a BSMMU doctor, unwilling to be named.
"It is still unclear how many days he will need to stay in the ICU," the BSMMU doctor familiar with Salahuddin's treatment said.
"He was admitted to the CCU of BSMMU around 11am on Monday after he complained of breathing difficulty," Shamsuddin Didar, a member of the BNP chairperson's media wing.
He also said Salahuddin has developed heart failure since 7pm yesterday, and his blood pressure is fluctuating.
"On 4 October, he was admitted to the CCU of BSMMU as per the recommendation of physicians," said Md Mahabubul Alam, jailer of Dhaka Central Jail.
Later, he was shifted to the prison annexe of the hospital.
Detectives arrested Salahuddin Ahmed from Dhaka's Jatrabari area on August 3. He was arrested in cases filed over the clash during a sit-in programme in Jatrabari.