A 15-year-old boy from Terrace, B.C., has died after playing a punching game with another teen at a friend's party, according to the dead boy's grandmother.

Police have released few details, but say Brad Levesque was at a friend's supervised birthday party and reportedly collapsed while playing with another teen. He was later pronounced dead.

"Our investigation at this point can confirm that there was a physical exchange between two 15-year-old boys and … at one point, one 15-year-old received a blow to the chest torso area," RCMP Cpl. Dan Moskaluk said.

"The purpose of the investigation at this time is to determine the nature and spirit of this physical exchange that was going on between these two youths."

However, the dead teen's grandmother Ali Wheeldon said her grandson was playing a game with friends at the party, exchanging punches to the chest in an effort to prove who was tougher.

She said her grandson's friend hit him three times in the chest before he died.
'They have to stop this'

She is urging other teens to learn a lesson from the tragedy.

"If they want to honour Bradley — and they've posted some amazing things on his wall on Facebook — if they want to honour Bradley they have to stop this," she said.

"No more kids need to die from this stupid foolishness because they want to prove that they're the alpha dog."

Wheeldon said the family feels for the boy who punched her grandson.
Fatal chest blows rare: cardiologist

Vancouver cardiologist Dr. Saul Isserow said it is very unusual for a young man to die from a blow to the chest, but not unheard of.

Isserow said a blow to the heart can trigger the heart to go into arrhythmia. It is most common amongst teenage boys, he said, but has happened only about 250 times in North America in the last 15 years.

"This is still a very, very rare event. Of all the kids who play sport, it's exceedingly unlikely that a puck or a hard ball or a blow is going to occur during that millisecond when the heart is vulnerable."

Isserow said cases like Levesque's raise anxiety for parents, but must be kept in perspective.

Meanwhile, Moskaluk said it is not clear whether charges will be laid.

He said an autopsy scheduled to take place Thursday will help determine whether the death will be considered accidental or criminal.

Moskaluk said police are still investigating whether alcohol was involved.

Terrace is approximately 700 kilometres north of Vancouver.