NEW DELHI (Reuters) - Ratan Tata, the chairman emeritus of one of India's biggest conglomerates, Tata Sons, is in critical condition and in intensive care in a Mumbai hospital, two sources said on Wednesday. Tata, 86, said on Monday he was undergoing routine medical investigations due to his age and related medical conditions.

Ratan Tata, a former chairman of Indian conglomerate Tata Sons, died at a Mumbai hospital on Wednesday night. He was 86.

Ratan Tata, the former Tata Group chairman who put a staid and sprawling Indian conglomerate on the global stage with a string of high-profile acquisitions, has died, the Tata Group said in a statement late on Wednesday.