School shooting near Seattle began in cafeteria.

At least two students were injured when a gunman opened fire Friday morning at a high school in Marysville, Washington, just north of Seattle, police and witnesses told CNN affiliate KOMO TV.

There were no immediate details released about the victims.

Authorities also did not immediately release details about the shooting, with Washington State Patrol spokeswoman Inci Yarkut saying only that investigators were responding to a reported school shooting.

"The Marysville-Pilchuck High School is currently in lockdown due to an emergency situation," the school district said in a statement.

"Police and emergency services have responded. The Marysville School District lock down procedures will remain in effect at Pilchuck until further notice from law enforcement."

A student locked down inside a classroom told CNN by phone that the shooting began in the cafeteria.

The student, whose name is being withheld, said when the shooting began students initially thought it was a fire drill until teachers told everyone to run into classrooms because there was was a shooting.

At least one person has been airlifted, according to the student. She believes multiple people have been shot.

The student said she was hiding in a classroom with other students, all of whom are unharmed.

Medeana Johnson, mother of a boy who is a junior at the school, told KIRO that her son said a boy opened fire near the cafeteria. She said her son told her he was supposed to be in the cafeteria but stopped to chat with someone and so didn't go in.

CNN affiliate KIRO-TV in Seattle showed police cars and ambulances outside the school. Aerial shots showed students running out of the buildings, many with their arms up.