 It is believed that the 15 August coup d'état was masterminded by Khondaker Mostaq Ahmad, a disgruntled member of Mujib's regime who would become president.Mansur went into hiding immediately after the killing.When Khondaker Mostaq Ahmad invited Awami League leaders such as Mansur Ali, Syed Nazrul Islam, A. H. M. Qamaruzzaman and Tajuddin Ahmad to join his government, they refused.