WAPATO, Wash.--Wapato Police said all six schools in the district were placed on lockdown Tuesday after school officials received a threat on social media.
Police said the "tweet" came from a student in the Upper Yakima Valley and warned there would be a shooting in Wapato.
School administrators contacted police, and reinforcements were quickly called in.
"We respond as fast as we can, but what we've done over time is, with current training, get other agencies here to respond with us as fast as we can to bring on the masses to come in and flood the schools," said Officer Jacob Murphy of the Wapato Police Department.
The suspect was taken into custody Tuesday afternoon, and no one was injured.
Police said the incident is still under investigation.