Bhutanese refugees are Lhotshampas ("southerners"), a group of Nepali language-speaking Bhutanese people, including the Kirat, Tamang, Magar, Brahman, Chhetri and Gurung peoples. These refugees registered in refugee camps in eastern Nepal during the 1990s as Bhutanese citizens deported from Bhutan during the ethnic cleansing carried out by King Jigme Singye Wangchuk of Bhutan. As Nepal and Bhutan have yet to implement any agreement on repatriation, many Bhutanese refugees have since resettled to North America, Oceania and Europe under the auspices of the Office of the United Nations High Commissioner for Refugees. Many Lhotshampa also migrated to areas of West Bengal and Assam in India independently of the UNHCR.
The earliest surviving records of Bhutan's history show that Tibetan influence already existed from the 6th century. King Songtsen Gampo, who ruled Tibet from the years 627 to 649, was responsible for the construction of Bhutan's oldest surviving Buddhist temples, the Kyichu Lhakhang in Paro and the Jambay Lhakhang in Bumthang. Settlement in Bhutan by people of Tibetan origin happened by this time.