TOPPENISH — Toppenish High School took “secure and teach” measures Thursday morning after three students were allegedly threatened with a gun on their walk to campus.

Police learned about the incident from an anonymous tip, according to Toppenish Police Capt. Dave Johnson. A caller said a student was walking to school around 7:30 a.m. when a black Honda drove alongside him and someone in the vehicle displayed a gun, Johnson said. He said the anonymous caller told police that the incident was gang-related and that there might be retaliation of some kind.

Toppenish School District Superintendent John Cerna said three students of the district’s alternative school adjacent to the high school allegedly were threatened in the incident.

The high school was placed in secure and teach — in which all doors are locked but teaching continues — as a precaution.

Cerna said the three students had been identified.

“All those kids are home now, safe,” he said. “But we have never ID’d the person who made the threat because he’s not in our system, not in our database system at all, at least with the name the police gave us.”

The secure and teach was lifted later that morning.

Johnson said the victim wasn’t cooperating.

“Without a cooperating witness or a victim, we really don’t have a lot to go on,” he said. “I’m sure he knows who it was in the car that drove by, but he’s not coming forward with information.”

Reach Janelle Retka at jretka@yakimaherald.com or on Twitter: @janelleretka