The victims were taken to hospitals for medical treatment. No information was reported about whether there was more than one shooter. Classes will resume Wednesday, but two hours later than usual.
Deputies established a perimeter around Graham-Kapowsin High. "I've heard conflicting reports and we're trying to shore reports up with the police departments right now", he said.
One of the shooting victims ran into the school after he was shot, Troyer said, and made it into the locker room bathroom.
The high school is located at 22100 108th Ave E.in Graham. All three schools were locked down while deputies searched the buildings and grounds. The Sheriff's Department says the shots were reportedly fired on the Eustis Hunt Road side of the campus, which is the northwest end of the school's property.
Deputies are seeking a green sedan, possibly a Chevrolet Impala, with multiple black males inside that may have fled the school after the shooting, Troyer said.
Troyer said that officers are investigating a motive for the shooting, and that it may have been gang-related.
Once the danger was cleared the students were released around 4:30 p.m. local time (7:30 p.m. EST).
Graham Elementary students were released to their buses about 3:10 p.m. After-school activities at Graham-Kapowsin High and Frontier Middle School were canceled.
In a prepared statement, district officials offered their " thoughts and prayers" for the students involved in the shooting and their families, and gave reassurance that students on the campus "are safe".