 Shahrbaraz, however, was unable to capture the city, and then made an alliance with Piruz Khosrow, the leader of the "Parsig", and the previous minister of the Empire during the reign of Ardashir's father.With the support of both the "Parsig" and "Nimruzi", Shahrbaraz captured Ctesiphon and executed Ardashir, Mah-Adhur Gushnasp himself, and many other prominent nobles.Shahrbaraz then ascended the Iranian throne.