Edmonton police said an investigation was underway into a serious collision on Whitemud Drive early Wednesday morning.

At about 4 a.m. Wednesday, officers were called to a crash involving a gravel truck and a small utility truck at 122 Street and Whitemud Drive.

Police said a worker in the smaller truck was working in a bucket lift when the gravel truck hit the vehicle. The gravel truck caught fire moments after the crash, and fuel was spilled on the roadway – that also ignited.

Smells like burning on the Whitemud. This truck burst into flames after rear-ending a utility truck this a.m. WB lanes still closed. #yeg pic.twitter.com/k9TQhDINv4 — Nicole Weisberg (@NWeisbergCTV) October 5, 2016

Both drivers sustained non-life threatening injuries.

Investigators said alcohol and speed are believed to be factors in the crash, and the cause is under investigation. No charges have been laid.

Due to the crash, the westbound lanes of Whitemud Drive were closed for several hours, into Wednesday afternoon. The City said the road was re-opened at about 2:20 p.m.