New Delhi: Assam Pradesh Congress Committee president Anjan Dutta passed away on Thursday morning at the AIIMS hospital in Delhi following cardiac failure.
Dutta, 64, was admitted to the hospital on 18 May, and was under treatment at the department of Pulmonary Sciences.
He was initially admitted to the Apollo Hospital in New Delhi on 12 May with complaints of severe chest infection.
He died due to cardiac failure at 7:11 on Thursday morning, Dutta's close relative Geetartha Darshan Baruah said.
The Congress leader leaves behind his wife and three daughters, one of whom had unsuccessfully contested the recent Assembly elections in Assam.
Congress Vice-President Rahul Gandhi had met him on 25 May.
Dutta, a close confidante of former Chief Minister Tarun Gogoi, was a Cabinet Minister handling several departments including transport, in the state in the past.
He was appointed APCC President on 13 December, 2014 and had been holding the post ever since.
Congress President Sonia Gandhi expressed "deep shock and grief" over the demise of the Assam state Congress chief.
Extending her condolences to his wife and daughters of Dutta, Gandhi said that in his death, not only the Assam state Congress, but the entire Congress party and the state had lost a leader committed to the people.
Congress Vice President Rahul Gandhi also expressed grief over the death of Dutta.
"Extremely saddened by the untimely demise of Shri Anjan Duttaji, Assam PCC President. His passing away is a big loss to @INCIndia & to Assam.My deepest condolences to his family", he tweeted.
Party General Secretary C P Joshi, who is in charge of party affairs in Assam, condoled the death.
"Congress party will miss a Committed partyman, mass leader and seasoned politician. PCC chief @AnjanDuttaINC leaves for heavenly abode #RIP", he tweeted.
Extremely saddened by the untimely demise of Shri Anjan Duttaji, Assam PCC President. His passing away is a big loss to @INCIndia & to Assam
— Office of RG (@OfficeOfRG) June 16, 2016
With input from PTI and IANS