FULLERTON, Calif. -- Authorities say an 18-wheel truck plowed into an occupied apartment building in California on Sunday morning, CBS Los Angeles reports.
Officers in Fullerton responded to the scene just after 6 a.m. following reports of the tractor-trailer slamming into a building.
When they arrived, they located the big rig inside the building and began evacuating residents.
Police said five apartments were evacuated, and those units have been deemed uninhabitable due to safety concerns.
Authorities said the truck driver and a passenger were rushed to the hospital for treatment. Three residents in the building -- including a 2-year-old -- were also transported to the hospital for treatment of minor injuries.
Police said an initial investigation review that the tractor-trailer was traveling within the posted speed limit along Imperial Highway when it suddenly veered across lanes, struck a curb and plowed into the building.
The cause of the collision is not yet known. The investigation is ongoing.