Mr Naik, 72, was taken to a private hospital in Margao town from his residence after he complained of uneasiness where he was declared brought dead, Goa Pradesh Congress Committee General Secretary Altinho Gomes told PTI.
He was declared dead at 7 am today.
"It is shocking news for us. We have lost a guide in the form of him. He had mentored so many youths and inspired them to join Congress party. It is a big loss for us," said Goa Congress leader Girish Raya Chodankar.
Considered as the party loyalist, Mr Naik was elected as the member of Lok Sabha in the 1984 General Election. He also pursued the demand for statehood to Goa which was fulfilled in the year 1987.
He is survived by his wife and a son.
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