BNP yesterday observed a six-hour token hunger strike in Dhaka, demanding its Chairperson Khaleda Zia's release from jail and proper treatment.
The programme began at the auditorium of Institution of Engineers, Bangladesh at 10:30am.
Leaders and activists of BNP and its associate bodies joined the hunger strike amid tight security.
BNP senior leaders, including its Secretary General Mirza Fakhrul Islam Alamgir, addressed the programme.
Last Tuesday, the party announced the event from a milad mahfil held at its Nayapaltan central office.
Khaleda Zia was admitted to Bangabandhu Sheikh Mujib Medical University (BSMMU) last Monday with severe pain in the joints, insomnia and high sugar level.
She has been in jail since February 8 last year when she was convicted of corruption. She was later found guilty in another corruption case.
Her release remains BNP's main demand and the party has been accusing the government of neglecting her treatment.