CLEARFIELD -- A 17-year-old Clearfield High School student is facing a first-degree felony charge after throwing a homemade smoke bomb into the school's common area Wednesday.
"We think it's a prank that's gone awry," said Assistant Police Chief Mike Stenquist.
Police and North Davis Fire Agency were called to the high school, at 931 S. 1000 East, at 10:20 a.m., Stenquist said.
The smoke bomb, which was 6 inches in length and about an inch in diameter, was made to create smoke and not blow up, he said.
About 1,600 students were evacuated from the school for 25 minutes until crews got the smoke cleared.
The smoke bomb injured five girls, who were treated and released at the scene, Stenquist said. They received minor burns from sparks made by the fuse.
The smoke bomb also burned a 20-foot area of linoleum and concrete floor, he said.
The boy was taken into custody.
"We think he didn't consider the consequences of his actions," Stenquist said.
Police will file a first-degree felony arson charge for the Davis County Attorney's Office to consider, because the smoke bomb was detonated in an occupied building, Stenquist said.