WARBURG, Alta. - A 20-year-old woman and a girl less than a year old have been killed in a highway crash southwest of Edmonton.

Mounties say the overnight crash involving a sport utility vehicle and a loaded semi-trailer tanker happened on Highway 39 just west of Warburg.

RCMP Sgt. Gary Hollender says the tanker caught fire after what investigators believe was a head-on collision.

Hollender says the woman and baby were killed instantly, but the truck driver wasn't hurt.

The names of the victims have not been released and charges are not being considered.

Highway 39 was closed for several hours following the crash.

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  • Grande Prairie, Alta. high school football players who were killed in a fatal car accident (left to right) Walter Borden-Wilkins, Vincent Stover, Tanner Hildebrand and Matthew Deller are shown in these handout photos taken from a Facebook tribute page. The Crown has said Brenden Holubowich, 23, is expected to enter a plea in court and lawyers are to argue over what sentence he should receive. He faces 16 charges, including impaired driving causing death and failing to remain at the scene of an accident in which the four players died. THE CANADIAN PRESS/HO-Facebook-In memory of Matthew Deller

  • Mourners hug during the funeral for Walter Borden-Wilkins in Grand Prairie, Alberta on Thursday Oct. 27, 2011. Borden-Wilkins, 15, Matt Deller, 16, Tanner Hildebrand, 15 and Vincent Stover, 16, were killed in Grand Prairie Alberta on Saturday. THE CANADIAN PRESS/Jason Franson

  • Eight months after the crash, crosses for Vincent Stover, Tanner Hildebrand, Matthew Deller and Walter Borden-WIlkins remain along the roadside June 4, 2012 in Grande Prairie, Alberta. (John Lehmann/The Globe and Mail)

  • Mourners gather for the funeral of Matthew Deller Friday Oct. 28, 2011, in Grand Prairie, Alta. THE CANADIAN PRESS/ William Vavrek

  • Deseree Judd looks at her son Zachary Judd, 16, as he speaks with the media at the Glenrose Rehabilitation Hospital in Edmonton, Alberta on Friday February 3, 2012. Zachary Judd was the only survivor of a car crash that took four of his Grande Prairie football teammates lives in October 2011. THE CANADIAN PRESS/Ian Jackson

  • Family, friends, and classmates wear memorial sweaters in team colors as they watch a semi-final playoff game between the Grande Prairie Warriors and the Sexsmith Sabres in Grand Prairie, Alta., Saturday, Oct. 29, 2011. Four players of the Grand Prairie Composite High School Warriors were killed in a car crash near the town last weekend, and a fifth remains in hospital with head injuries

  • Family, friends, and classmates cheer as they watch a semi-final playoff game between the Grande Prairie Warriors and the Sexsmith Sabres in Grand Prairie, Alta., Saturday, Oct. 29, 2011. Four players of the Grand Prairie Composite High School Warriors were killed in a car crash near the town last weekend, and a fifth remains in hospital with head injuries.

  • NFL Canada has honoured a coach who led an Alberta high school team to victory despite mourning the deaths of four players. Rick Gilson of the Grande Prairie Composite High School Warriors has been named youth coach of the year. Gilson is shown speakinh at a public memorial service in Grand Prairie, Alta., Sunday, Oct. 30, 2011

  • Zachary Judd, 16, runs through the corridors of the Glenrose Rehabilitation Hospital with his physiotherapist Annette Lemke in Edmonton, Alberta on Friday February 3, 2012. Zachary Judd was the only survivor of a car crash that took four of his Grande Prairie football teammates lives in October 2011.

  • Brenden Holubowich walks with supporters as he makes his way to the courthouse for sentencing in the deaths of four high school football players, in Grande Prairie Alberta, on Tuesday February 26, 2013. In October 2011, Brenden Holubowich's pick-up truck collided with a car carrying five members of the Warriors football team from Grande Prairie Composite High School, killing four of the teenagers and injuring one.

  • Brenden Holubowich walks with supporters as he makes his way to the courthouse for sentencing in the deaths of four high school football players, in Grande Prairie Alberta, on Tuesday February 26, 2013. In October 2011, Brenden Holubowich's pick-up truck collided with a car carrying five members of the Warriors football team from Grande Prairie Composite High School, killing four of the teenagers and injuring one.

  • Holly Borden mother of deceased football player Walter Borden-Wilkins and Connie Hildebrand-Strong mother of Tanner Hildebrand who also perished in the same accident, hug outside the sentencing of Brenden Holubowich in Grande Prairie, Alta. on Tuesday, February 26, 2013. In October 2011, Holubowich's pick-up truck collided with a car carrying five members of the Warriors football team from Grande Prairie Composite High School, killing four of the teenagers and injuring one.