KANSAS CITY, Mo. (AP) — Authorities have taken a student into custody while investigating threats that have forced the evacuation of a Kansas City-area high school.

The Kansas City Star reports that Clay County Sheriff’s Department spokesman Jon Bazzano says police tackled the student Monday when he bolted from Oak Park High School during the evacuation. Bazzano says the student injured his arm during the process.

Deputies and @kcpolice still working methodically through each classroom to check & evacuate students to Staley. Safety is our 1st priority.

— Clay County Sheriff (@SheriffClayCo) March 27, 2017

No weapons have been found, but the North Kansas City, Missouri, school was cleared as a precaution. School official said in an email to families that students were being taken in buses to another school “to ensure law enforcement can most effectively assess the situation.” Authorities are going through classrooms.

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KANSAS CITY (AP) — Students at a Kansas City-area high school are being evacuated as authorities investigate a reported anonymous threat that put the school on lockdown.

Authorities say they found no weapons at Oak Park High School after the threat Monday morning but were clearing out the North Kansas City, Missouri, school as a precaution.

School official said in an email to families that students were being taken in buses to another school “to ensure law enforcement can most effectively assess the situation.”

Media outlets reported that Kansas City bomb-and-arson squad members were at the school.

There was no immediate word about any arrests or charges.