A Kamloops, B.C. lacrosse dad says he's still can't believe he watched as his teenage son's head was stomped on during a game.

The 15-year-old player has been hospitalized with a possible broken bone in his neck after the incident, which happened partway through Sunday's game between the midget team from Kamloops and visitors from Kelowna.

RCMP Staff Sgt. Grant Learned, whose force is investigating the incident, says witnesses watching the game said they saw a player crosscheck an opponent, knock him down and then stomp on his head.

"I was in shock. I'd never seen anything like that in my life in sports," the teen's father, Patrick Rose, told CTV British Columbia.

The boy was taken from Kamloops' Memorial Arena to a city hospital at about noon on Sunday. The boy's father told CTV that it's too soon to know whether his son's neck is indeed broken.

The motive for the attack is unclear.

The boy's parents called the police to report the incident, which is now under investigation to determine whether criminal charges should be laid. The league has already suspended one player indefinitely.

Police are seeking any video taken during the game, as it may assist with their investigation.

Kamloops is about 350 kilometres northeast of Vancouver and has about 85,000 residents. The municipal website boasts of being B.C.'s "friendliest city" and "Canada's tournament capital."

With files from The Canadian Press