INDIAN RIVER COUNTY — Preliminary information from an autopsy on Kamaree Lyons, the 17-year-old student-athlete who collapsed and died Saturday at Sebastian River High School, suggests the boy may have had a heart condition.

"There are some abnormalities of the heart, but further testing is pending to determine the cause of death," said Christine Canard, administrative manager at the Medical Examiner’s office in Fort Pierce.

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Kamaree was playing pickup basketball Saturday at an open gym event at Sebastian River High School when he collapsed and began having a seizure about 6:45 p.m., officials said.

He was taken by ambulance to Sebastian River Medical Center, where he was pronounced dead. The Indian River County Sheriff's Office is investigating.

Canard said an official determination of the cause of death could take about six weeks after Dr. Linda O'Neil performed the autopsy Tuesday.

A memorial is scheduled to begin about 8:15 p.m. Thursday after a JV football game at the high school football stadium.

Kamaree, who wore No. 43, was in the midst of his first varsity football season. He played fullback and was on special teams.

Grief counseling remains available at the high school and Gifford Youth Achievement Center, where Kamaree has been a regular since he started elementary school.

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He was remembered by family and the center's staff as a sweet, respectful young man with a bright future.

Kamaree's older cousin Freddie Woolfork, who works at the center, said he "looked like a picture of health."

Kamaree's sister Ebony Hart, who was helping raise Kamaree after their mother's sudden passing in late 2015, requested privacy as she grieves.

A wake is scheduled for 4 to 7 p.m. Friday at Gifford's Friendship Missionary Baptist Church, 4545 30th Ave.

The funeral is set for 11 a.m. Saturday at Central Assembly Church, 6767 20th St.