A leading Bagladeshi daily, 'Prothom Aalo' quoted sources in Bangaldesh Cricket Board as saying that Mahmud has sent his resignation to BCB chief executive Nizamuddin Chowdhury via email yesterday.
BCB cricket operations committee chief Naimur Rahman declined to comment on the matter. He simply said that the issue would be discussed with Mahmud.
Mahmud, a former Bangladesh cricketer, was a medium pacer and middle-order batsman. He represented Bangladesh from 1998 to 2006, leading the team from 2003 to 2004.