India, Aug. 22 -- Three of the six newly born tiger cubs at the Delhi zoo have been admitted at the hospital due to an infection, officials said on Thursday. Last week, another cub was admitted at the Delhi zoo hospital, taking the total tally of cubs hospitalised to four.

Six Bengal tiger cubs were born to seven-year-old Tigress Aditi at the Delhi zoo on August 4, the largest litter at the zoo in two decades. However, the celebration has been marred with death of two cubs - one described as the weakest of the litter died on August 8, and another which was not able to feed on mother's milk on August 10.

The condition of the three cubs is critical while the fourth one admitted last week is stable and being hand-reared, said officials.

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