After being declared officially extinct in India over seven decades ago, two Namibian cheetahs – the world's fastest land animal – relocated to the South Asian country last year, have been released into the wild.

"Both cheetahs are doing good," India's Environment Minister Bhupender Yadav tweeted Saturday after the male and female darted from quarantine enclosures of Kuno National Park into the wild.

"Big day for the cheetah reintroduction program," Yadav added.

Obaan and Asha were among eight cheetahs brought to India last September after India's top court ruled in 2020 that the species should be reintroduced experimentally.

The program is a major prestige project for Prime Minister Narendra Modi, who presided over releasing the animals into an enclosure after their arrival.

Twelve more globally listed "vulnerable" big cats were translocated from South Africa last month, with India aiming to bring in about 100 of them over the next decade.

The last Asiatic cheetah to roam the sub-continent was believed to have been hunted down in 1947 by an Indian prince.

The spotted feline was declared officially extinct in India in 1952.

Kuno National Park, a wildlife sanctuary in central India, was selected to relocate the African cheetahs – a different subspecies – for their abundant prey and grasslands.

The African cheetah's introduction in India is the first intercontinental relocation of the planet's fastest land animal.

Critics have warned the creatures may struggle to adapt to the Indian habitat due to competition for prey from many leopards in the national park.

Cheetahs are one of the oldest big cat species, with ancestors dating back about 8.5 million years, and they once roamed widely throughout Asia and Africa in great numbers.

But today, after their extinction from many countries across the Middle East and Asia, only 7,000 remain, primarily in the African savannahs.