Two days after a tragic crash on Highway 63, friends of another couple involved in the crash that afternoon have confirmed them as Courtney and Mark Penney.

A friend of the couple said Mark and his wife were on their way to Edmonton with Shannon Wheaton, his partner Trena, and their children Benjamin and Timothy.

Courtney Penney was six months pregnant.

The two families were in a truck, headed south on Highway 63 at about 1 pm on Friday when their truck collided with another pickup carrying three people, which was attempting to pass another northbound vehicle when the crash occurred.

Both trucks burst into flames on impact.

In all, seven died as a result of the crash – including Shannon, Trena and Benjamin Wheaton, Courtney Penney, and three more in the other vehicle.

RCMP say Mark and the Wheaton's three-year-old son Timothy are still in hospital, Mark is in serious condition - and at last word Timothy was in stable condition.

An 11-year-old girl was pulled from the northbound truck by passersby, but succumbed to her injuries Friday evening.

Shannon Wheaton was working as a pastor at the Family Christian Centre church in Fort McMurray at the time of his death, Courtney Penney had been helping teach the youth group at the same church.

Grief counselors will be at the centre on Monday and Tuesday, to help those affected by the tragedy – a friend of the Penney family said she is still coming to terms with the death of her friend.

"It's a big loss to the community and the church," Vanessa Humby said.

"I think we're all still in shock. Like there's seven people gone and it's too many at once, and we're still in shock."

RCMP said Saturday they are still working to positively identify two of the deceased in the northbound truck.

With files from Sean Amato