A 16-year-old boy died following a motorcycle accident today at Kahuku Motocross Track, the most serious in a string of motorcycle-related accidents on Easter weekend that left three other people in serious condition. 

Witnesses said the boy, identified by friends as Kahuku High School student Wayne Stevenson, was riding on the main track at Kahuku around 2:30 p.m. when he apparently crashed following a jump. He reportedly went into cardiac arrest following the crash and was attended to by track officials until paramedics arrived. 

“Everyone was in shock,” said Christy Blanchard, who was at the track but did not witness the crash. “It’s very sad. I’ll definitely think twice next time I ride.”

Stevenson, who played middle linebacker on Kahuku’s junior varsity football team, was an avid motocross racer. On his Myspace page, Stevenson identified himself as a professional rider with sponsorships from Monster and Rockstar.

Sunday’s crash was the fourth time over the weekend that emergency personnel were called to the track, according to a spokeswoman for the city Department of Emergency Services.

About 1:30 p.m. Saturday, a 53-year-old man was taken from the site to the hospital in serious condition.

About 4:02 p.m. Saturday, paramedics took a man in his 40s from the track to the hospital in serious condition. A short time after the second incident Saturday, paramedics were dispatched to the site a third time but a man, 39, declined treatment. 

On Sunday, a male motorcycle rider, believed to be in his late teens, was taken to the Queen’s Medical Center in serious condition following a crash at Waihee Road and Waihee Place in Kaneohe.

Shortly after 2 p.m., a 39-year-old man and a 46-year-old woman were seriously injured in a crash near on Kamehameha Highway near Swanzy Beach in Kaaawa. 

Paramedics took both to the hospital in serious condition, a spokeswoman for the city Department of Emergency Services said. No other vehicles were involved.