The state religion is Islam. Most of the population belong to the Ibadhi or Sunni sects. Tribes in the north are mainly Sunni Muslims of the Hanbali, Shafai, and Wahhabi rites. A minority of the population is Shi'a Muslim. There is a small community of Indian Hindu citizens, and there is reportedly a very small number of Christians. Non-Muslims, the majority of whom are non-citizen immigrant workers from South Asia, are free to worship at churches and temples, some of which are built on land donated by the Sultan.