The school in Des Moines, a few miles south of Seattle-Tacoma International Airport, was put on lockdown Friday morning after reports of gunfire, the college said in Facebook posts and automated phone recordings.
Jarod Kasner with the Kent Police Department said that the search was finished and police “have found no injuries or indications of weapons being fired.”
Capt. Kyle Ohashi with the Puget Sound Regional Fire Authority said officers found no gunshell casings, holes in the wall or other evidence of a shooting.
A couple of people were treated for non-trauma type injuries, similar to anxiety, Ohashi said.
Authorities have not said what caused the initial alarm.
Highline College’s Facebook page first mentioned a lockdown and the report of shots fired in a post shortly before 9 a.m. (noon ET).