Students at Grass Valley Elementary in Camas were briefly evacuated due to a bomb threat Thursday.
The threat was found written in chalk on a sidewalk outside the school about 9:30 a.m., according to the Camas School District and the Camas Police Department.
School officials and police searched the building, disrupting classes for about a half an hour, but didn’t find anything suspicious.
Camas police Sgt. Scot Boyles said the threat level was low, but that an investigation into the incident is ongoing.