District Fire Chief Lorne Corbett said the truck struck a Bonanza restaurant in a strip mall about 1:30 a.m. MST, and the fire spread quickly through the other businesses.
The blaze caused an estimated $12 million in damage, the Canadian Broadcasting Corp. reported.
It wasn't known what happened to the truck driver.
Arson investigators were at the scene, the CBC said.
Notable deaths of 2014 [PHOTOS]