Calgary police say speed is responsible for taking another life in the city.

A woman was killed when her car hit a curb, swerved and hit a tree early Wednesday morning in northwest Calgary.

The accident happened at the intersection of 14th Street and Berkley Gate N.W. at around 3:30 a.m. MT.

The force of the crash uprooted the tree and bent the car in half, said traffic section Sgt. Mike ter Kuile.

"It’s catastrophic. Unfortunately the driver was literally moved from the left front driver’s compartment into the right rear of the vehicle," he said.

"She was belted in the vehicle at the time, but obviously that won’t make any difference in a case like this."

The 19-year-old woman, who was alone in the car, was pronounced dead at the scene.

There were no witnesses.

29-year-old man died early Tuesday morning when his SUV slammed into the back of a street sweeper on Shaganappi Trail in northwest Calgary. Ter Kuile says speed and alcohol were factors in the crash.