later during the siege of Bishapur or called city of Sabur by the Arabs by Maja'a bin Masud's troops. In circa 643 Uthman ibn Abi al-'As arrived to Bishapur with the new reinforcements from Basra and besieging the fortified town for several weeks before the town was forced to surrender and made peace treaty with the inhabitants of the city. further waves of reinforcements were arrived under Sariyah bin Zuinem, then followed by forces under Suhail bin Adi, and lastly by Asim bin Amr arrived into the soil to completely pacify Kerman
Conflicting reports about Shahrak's death
there's a conflicting reports about the time of death of Shahrak. In 19/644, al-'Ala' once again attacked Fars from Bahrain, reaching as far as Estakhr, until he was repelled by the governor (marzban) of Fars, Shahrak. Some time later, Uthman ibn Abi al-'As managed to establish a Misr, a military base which regimental system was based on the Immigrant Tribal(mainly Arabs) system at Tawwaj, and shortly defeated and killed Shahrak near Rew-shahr (however other sources states that it was his brother who did it). A Persian convert to Islam, Hormuz ibn Hayyan al-'Abdi, was shortly sent by Uthman ibn Abi al-'As to attack a fortress known as Senez on the coast of Fars. After the accession of Uthman ibn Affan as the new Caliph of the Rashidun Caliphate in 11 November, the inhabitants of Bishapur under the leadership of Shahrak's brother declared independence, but were defeated. However the date for this revolt mains disputed, as the Persian historian al-Baladhuri states that it occurred in 646.
but another source from Kennedy suggesting that Shahrak himself was already died in the start of Muslim campaign of Fars in Rashahr in 640 while attempt to repel the Muslims advance 
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