The CPI(M) had said earlier that the 72-year-old leader was being treated for an acute respiratory tract infection at the ICU in AIIMS, Delhi.
Yechury was admitted to the hospital on August 19 for treatment of a pneumonia-like chest infection.
He was critical and on oxygen support. The sources said he had a fungal infection in his lungs.
The leader, who started from the student's union of Jawaharlal Nehru University (JNU) as a member of the Students' Federation of India (SFI) and went on to become a member of the Central Committee of the CPI(M) in 1984, got elected to the Politburo in 1992.
He served as a
He also played a significant role in the joint opposition's INDIA bloc. He was seen among the political mentors of Congress leader and