A family spokesman said he died of a heart attack.

He died after a long illness, a family spokesman said.

The cause was a heart attack, a family spokesman said.

His death, at the age of 87, was caused by a heart attack, a family spokesman said.

The cause of his death was a heart attack, a family spokesman said.

His death was caused by cancer, a family spokesman said.

The cause of death was cancer, a family spokesman said.

He was 80 years old and died of natural causes, a family spokesman said.

He died of a heart attack, a family spokesman said.

A family spokesman gave his age as 80, although some reference works said he was 83.