Al-Nu'man did as he told him, and with a small portion of his army, charged into Shushtar. Hormuzan then retreated to the citadel and continued his resistance, but was eventually forced to surrender. According to another version written in the Khuzestan Chronicle, similar to the version by al-Tabari, a defector from Qatar, along with another person, asked the Arabs for some of their plunder in exchange of how to enter the city. The Arabs agreed, and after some time, they managed to enter the city. According to al-Baladhuri, during the siege, the Arabs were reinforced with a group of professional Iranian elites under Siyah al-Uswari, known as the Asawira.