Edmonton police are investigating a fatal crash that killed a 28-year-old man and shut down a portion of Gateway Boulevard early Wednesday morning. 

The crash happened around 2 a.m. when the driver lost control of his Jeep Wrangler. After knocking down a light standard and striking billboards and trees, the vehicle eventually slammed into the side of a building near 61st Avenue.

The male passenger sustained life-threatening injuries and died shortly after he was taken to hospital. The driver received serious injuries but is in stable condition. 

Police say speed and alcohol may have been involved.