A Massapequa High School senior "experienced a sudden medical event" during a varsity ice hockey game Saturday night and died at a hospital.

A letter to students and families from the administration at Massapequa High School announced the death of Connor Kasin.

"It is heartbreaking to report that Connor did not survive. His passing is devastating to the Massapequa community, and we offer our deepest condolences to Connor's family and friends," the letter said in part.

The nature of the medical event was not immediately known.

Nassau police said in a release that "medics and officers responded to the Town of Oyster Bay Skating Center…for a 17-year-old male who had lost consciousness on the ice during an intermission of a hockey game."

It said that "civilians" began CPR until an ambulance and police arrived.

William Sander, a senior at the high school, called Conner “a good guy."

“I pray for him and pray for people around him. Honestly, it's very sad and heartbreaking," he said.

The Massapequa School District tells News 12 grief counseling will be available throughout this week.