The Zoroastrians moved to India in successive migrations in the Islamic period. The initial migration following the conquest has been characterized as a religious persecution by invading Muslims. According to the account, the Zoroastrians suffered at their hands and in order to protect themselves and safeguard their religion, fled first to northern Iran, then to the island of Hormuz and finally to India. This generally accepted narrative of migration emphasises Muslim persecution while identifying Parsis as religious refugees. Recently, scholars have questioned this explanation of Iranian origins. There is a scarcity of sources about the migration. Historians are forced to rely exclusively on "Qissa-i Sanjan" written in 1599 by a Parsi Priest and "Qissah-ye Zartushtian-e Hindustan" written more than 200 years later. This is complicated by the fact that there were already Zoroastrians in India in the Sasanian period. According to the legend, at the beginning of the 10th century a small group of Zoroastrians living around the town of Nyshapour and Fort of Sanjan in the province of (greater) Khorasan, decided that Iran was no longer safe for Zoroastrians and their religion. The refugees accepted the conditions and founded the settlement of Sanjan (Gujarat), which is said to have been named after the city of their origin (Sanjan, near Merv, in present-day Turkmenistan).