He was 73, and was admitted in a hospital in Delhi for some ailment.
After being discharged from the private hospital, Moolsingh along with his family members was supposed to board a train from Delhi station in the afternoon when he suddenly suffered a heart attack and died, his family member Yogendra Soni said.
His mortal remains are being brought to Guna from Delhi, he said.
Moolsingh is survived by wife, two sons and a daughter.
Digvijay Singh belongs to Raghogarh, the former princely state of Madhya Pradesh.
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