Yagub Javad oghlu Mammadov (Azerbaijani: Јагуб Ҹавад оғлу Мәммәдов, romanized: Yaqub Cavad oğlu Məmmədov; born 3 March 1941), commonly known as Yagub (also Jacob in English) Mammadov (Azerbaijani: Yaqub Məmmədov), was the acting President of Azerbaijan from 6 March to 14 May and from 18 to 19 May 1992.
[2] On 6 March, President Ayaz Mutallibov was forced to resign and according to the Azerbaijani constitution of the period, speaker of the parliament, Yagub Mammadov assumed the presidential duties and responsibilities until the new elections.
[3][4] While acting as the President of Azerbaijan, Mammadov met with Levon Ter-Petrosyan in Tehran in an effort to start peace talks mediated by Iran.
On 8 May, when the Tehran Communiqué between Ter-Petrosian and Mammadov was signed, Armenian forces captured Shusha.
[6] On 14 May, the former President Mutalibov returned to power after the parliament relieved him off the responsibility for the Khojaly Massacre, but was ousted by the armed revolt led by Azerbaijan Popular Front on 15 May.