CHARLOTTETOWN , P.E. -- People on Prince Edward Island are grieving after losing two of their most promising young athletes in a triple murder-suicide.

Tabitha Stepple of Lethbridge was gunned down along with Mitch MacLean,Tanner Craswell, and Shayna Conway, who were all from Prince Edward Island. Police say Derek Jenson killed them on a highway near Claresholm, Alberta on Thursday, December 15 before turning a gun on himself. They were on their way to the Calgary airport to make their way home for the holidays.

Police say Derek Jensen was Stepple's ex-boyfriend and he followed the vehicle and shot everyone, and then himself.

Conway was the sole survivor from the shooting. She is recovering in a Calgary hospital.

MacLean and Craswell both attended Colonel Gray High School in Charlottetown. The school is having a big game of catch on Monday, December 19 to say goodbye to the accomplished baseball players. The pair were both playing baseball for the Lethbridge Bulls.

The school's principal, Kevin Whitrow, says the game of catch seemed like a perfect tribute.

"I think there is a fair amount of interest in the community to say this is something that would be an honour to the kids and an honour to their families, to have people come together and do something that the guys loved to do," Whitrow said.

The game of catch will take place on a field by the school on Monday afternoon.

With files from CTV's David Bell.