The pregnant coach of a Pennsylvania college lacrosse team and her unborn child were among those killed on Saturday after the team's bus crashed into a tree.

CNN reported that Seton Hill University womens' lacrosse coach Kristina Quigley was six months pregnant when the bus veered off the highway Saturday morning. A spokesperson for the Cumberland County Department of Public Safety said the child also died.

The man driving the bus, 61-year-old Anthony Guaetta, was pronounced dead at the scene. Twenty-two of the 26 passengers were also sent to hospitals around the area to be treated for injuries.

Authorities are still investigating what caused the bus, which was carrying the team's 23 players and three coaches, to veer off the road. Police said the bus hit a guard rail and traveled for 70 yards through grass before hitting the tree. The company that owns and operates the vehicle, Mlaker Transportation, said in a statement it was cooperating with both investigators and the university.

ABC News reported that Seton Hill will hold a memorial mass for Quigley Saturday night.

"The Seton Hill community is mourning the loss of Kristina Quigley and her unborn son," a university spokesperson said in a statement. "The university extends deepest sympathy to Quigley's husband and family."

Watch footage of authorities at the scene of the fatal crash, posted by the Associated Press on Saturday, below.