Celebrations have erupted in southern India to mark the creation of the new state of Telangana, the culmination of a separatist campaign stretching back nearly six decades.
Kalvakuntla Chandrashekar Rao, who at one stage went on a hunger strike as part of the push to create what is India's 29th state, was sworn in as chief minister during a morning ceremony in Hyderabad on Monday.
Residents broke into celebrations at the stroke of midnight, with a fireworks display lighting up the skies over the city.
India's new Prime Minister Narendra Modi was among the first to congratulate Rao, promising his "complete support to the people & Government of Telangana" in a message on Twitter.
"India gets a new state! We welcome Telangana as our 29th state. Telangana will add strength to our development journey in the coming years," Modi said.
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"Telangana's birth comes after years of struggle and sacrifices by several people. We pay our respects to them today."
Telangana has been created by splitting the state of Andhra Pradesh in two. Hyderabad, an IT hub, will serve as the capital of both states for the next decade.
The campaign to create a separate state in one of India's most economically deprived regions began in the late 1950s.
Wealthier coastal regions of Andhra Pradesh fiercely opposed the split, fearing it would trigger economic upheaval.
Andhra Pradesh's chief minister resigned this year on the eve of a vote by parliament to approve Telangana's creation.
The build-up to the vote was marred by chaotic scenes in parliament, with MPs coming to blows. One representative even squirted pepper spray at colleagues.
Analysts had seen the decision by the then Congress government to back the state's creation as a strategic move designed to increase its support in the south in a general election year.
However, Congress won only two of the 42 seats in the undivided Andhra Pradesh when the election results were announced in May.
India last redrew its internal boundaries in 2000, creating three new states in economically deprived areas in the north.
Critics say the bill could open a "Pandora's box" of demands for statehood by other regional groups in the ethnically diverse nation, which has a host of separatist movements.
