WAUKESHA, Wis. (AP/WTVO) — A student is in custody after exchanging gunfire with a school resource officer Monday morning at a Waukesha high school, the school district said.

Police in Waukesha tweeted about 11 a.m. that officers were responding to a “critical incident” at Waukesha South High School.

Police said a 17-year-old male suspect was injured after being shot after exchanging fire with the school’s resource officer and was taken away in an ambulance.

Students who streamed out of the school about 11:15 a.m. said there was an announcement about a drill and they began to take cover under desks and teachers barricaded doors. They told reporters outside the school that they knew it wasn’t a drill when they heard two or three gunshots.

Parents gathered outside and hugged students as they streamed out of the school in Waukesha, about 18 miles (30 kilometers) west of Milwaukee.

Police said it was an isolated incident and that they are not seeking any other suspects.

Several hours later on Monday afternoon, a second student was arrested, this time for allegedly bringing a weapon to Waukesha North High School.

According to Waukesha Police, Waukesha North was placed on lockdown this afternoon after receiving a report of a student with a a firearm.

Police say the suspect was located at a residence within the city some time later and was taken into custody.

There was a report of a student possessing a firearm at north high school. The school was placed on lockdown and searched. The student was located in a residence in the City of Waukesha and was subsequently taken into custody, more information at a later time

— WaukeshaPD (@WaukeshaPD) December 2, 2019

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