A high school sophomore collapsed at track practice and died after suffering back-to-back heart attacks, authorities say.
Kyle Brewer, 16, suffered the first heart attack Friday afternoon during practice at New Paltz High School, the New York school district said.
Teammates and coaches used a defibrillator on Brewer and did CPR while others called 911.
Officials say he suffered another heart attack Sunday at a hospital and was declared dead late Sunday.
Students at the high school were told about his death during an assembly Monday morning.
Principal Barbara Clinton called Brewer "an impressive young man" who was well-liked and had a great sense of humor.
"He was a good friend, studious, never angry, thoughtful and mature beyound his age," Clinton said.
A white roll of paper was hung at the high school Tueday so students could write their thoughts and share condolences with Brewer's family, the district said.