A detonated sparkler bomb taped to a window close by the staff lounge at was discovered last Wednesday along with minor damage, Enumclaw police reports say.
It was the second time a sparkler bomb was used to cause damage at the school this academic year, Superintendent Mike Nelson said Tuesday.
Neither incident caused any injuries to staff or students, Nelson said.
Earlier in the fall, a similar device was used and caused several thousands of dollars in damages to the school's special education preschool, said district business and operations manager Tim Madden. By comparison, the damage caused by the device discovered last week was fairly minimal though the window remained boarded up as of Tuesday night.
In both incidents, the affected areas of the campus were outside-facing, and the district is working with police to provide extra patrols in the area, said Nelson.
School officials have also improved the night lighting of the campus in hopes of making it easier for neighbors to keep an eye out for suspicious activity, said Madden.
Whether or not these incidents are related remains unclear but "we would certainly like to see this behavior stop," said Enumclaw police Lt. Bob Huebler.
If you see suspicious activity, please call the Enumclaw police tip line at 360-615-5707. All calls are confidential.