New Delhi (CNN) — Three cheetah cubs have died in India this week, dealing yet another setback to a historic effort by the government to reintroduce the species to the country after 70 years of extinction.

The cubs were part of a litter of four born in late March to a cheetah named Siyaya, who was one of eight rehabilitated cheetahs brought from Namibia to India’s Kuno National Park, in the central state of Madhya Pradesh, in September last year.

CNN’s Tara Subramaniam, Manveena Suri and Zoe Sottile contributed to this report.