Rana, 34, who is related on her mother's side to India's aristocratic Scindia family, fled Nepal after an intoxicated Dipendra shot his parents, King Birendra and Queen Aishwarya, and seven other royals, before killing himself.

Unofficial reports said the crown prince's shooting spree was probably triggered by his parents' opposition to his plans to marry Rana, whose family had been at loggerheads with the kingdom's monarchs.

Devyani, who belongs to the Rana clan that ruled Nepal until 1951, married Aishwarya Singh, grandson of India's human resources development minister, senior Congress party politician Arjun Singh, according to media reports.