Marshal of IAF Singh was admitted to Army's Research and Referral hospital this morning after he suffered a cardiac arrest, the defence ministry said.
Arjan Singh was a respectable figure of the Indian military history.
The Marshal has been awarded the Padma Vibhushan for his leadership during the war.
The Marshal has flown over 60 aircrafts and remained a flyer until the end of his career with the IAF.
Five-star Marshal Arjan Singh retired in August 1969. In 2016, the crucial air base at Panagarh Air Force Station was renamed after the Marshal. Panagarh is also the headquarters of the newly raised 17 Crops - Mountain Strike Corps. (ANI)