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POWAY, Calif. — Police are investigating a bomb threat that was sent to Poway High School Tuesday morning, authorities said.

Police said the threat was sent to the school in an email just after 7 a.m. Police were still investigating the threat at 10 a.m. Tuesday, but said the school is not currently on lockdown.

“The threat makes reference to after-school hours,” Poway High School Principal Richard Nash said in an email sent to parents and students Tuesday morning. “We take all threats seriously and the post was reported to law enforcement, who are here on site checking the campus.”

Check back for updates on this developing story.