G M Banatwala, president of the Indian Union Muslim League, died in Mumbai on Wednesday after a brief illness, family sources said.
He was 74. Banatwala's wife died few years ago.
Ismail Banatwala, his nephew, told PTI that he lived with his brothers in the city after the death of his wife. He had no children.
Ismail said his uncle had attended the IUML's platinum jubilee celebration in Chennai last Saturday.
"When he returned home early this week, he felt uneasy, restless and feverish. This morning he had breakfast with all of us. At about 2.30pm, he experienced uneasiness and breathed his last on way to hospital," Ismail said.
Banatwala is a seven-time Lok Sabha member and represented the Ponnani parliamentary constituency in Mallapuram district of Kerala.
Banatwala's mortal remains will be brought to his Agripada home in south Mumbai later in the day. The funeral is expected to take place in the night as many of his colleagues from Kerala are expected to attend it.
