The decision was made to avoid intra-party conflict and encourage a participatory election, the party said
His wife Rahat Ara Begum told bdnews24.com ," Mirza boarded a Bangladesh Biman flight for Singapore at 8:40 am on Friday morning to seek medical care at Singapore National University."
Fakhrul went abroad amid BNP's call to resume its movement for an election under a neutral caretaker government.
During his imprisonment, Fakhrul complained about 'a problem' in his throat in 2013. Later he was treated at BSMMU and at United hospital.
Following his doctors' advice, he sought medical care at Singapore National University Hospital on May 14 last year.
On Feb 8, 2014, he went again to Singapore and was treated at Mount Elizabeth Hospital.