Joseph Cicippio Jr., son of an American held hostage in Lebanon, died Sunday of a heart attack at age 35, hospital officials said today.

Cicippio was taken to North Penn Hospital early Sunday morning, said a nursing supervisor, who refused to give her name. He was pronounced dead at 6:29 a.m.Joseph Cicippio Sr., a former resident of Norristown, was taken hostage in Beirut on Sept. 12, 1986. His son became the third member of his family to die since he was taken into captivity.