Dhaka, Nov. 24 -- Khaleda Zia has been diagnosed with a "chest infection" and is under intensive medical observation at the Evercare Hospital, her doctors say.

She was brought to the private health facility in Bashundhara on Sunday night for health examinations and, following tests, was admitted for treatment.

Dr FM Siddiqui, a member of the medical board assigned to her care, confirmed that she is receiving treatment in a private cabin.

"Her condition over the next 12 hours is crucial," he told reporters.

"Over the past few months, she has been falling ill very frequently. The reason we admitted her here to Evercare Hospital today [Sunday] is that multiple health issues have coincided."

He added that pre-existing heart conditions ha...