A member of the family told newsmen in Umuahia on Tuesday that Onuigbo died on Monday evening at the Federal Medical Centre (FMC), Umuahia.
The source said on the condition of anonymity that “he died after a brief illness at FMC and (his corpse) has been deposited at the mortuary.”
He declined further information regarding the cause of his death.
The Publicity Secretary of the party, Mrs Love Ezema, said in a telephone interview that she was shocked when she heard the news of the death.
“I was deeply shocked to hear that he died yesterday,” Ezema said.
NAN correspondent reports that sympathisers were seen trooping in and out of the late chairman’s country home at Umuobasi Ugba in Umuahia.
The deceased was described as benevolent, humane, friendly and likeable, with scores of indigent students from his community under his scholarship scheme.
NAN recalls that Onuigbo was a one-time Transition Committee Chairman of Umuahia North Local Government Area and former Vice Chairman, PDP Abia Central Zone.
He was elected the chairman of the party in 2006 and appointed the chairman of the caretaker committee on May 14, at the expiration of his four-year tenure.