KENOSHA, Wis. (CBS 58) -- A malfunction with electronic equipment triggered a lockdown at Kenosha Indian Trail High School Monday morning, Oct. 4. 

According to Kenosha police, they were called to the school for a report of an active shooter. However, no shots were heard and there was no evidence of a shooting found. 

Police said students and staff did as trained and barricaded doors. 

Officials searched the school and gave the "all clear" just after 11 a.m. Students then returned to class. 

Police said in a tweet, the incident was triggered by malfunctioning equipment. 

Large Police presence at Indian Trail High School for report of active shooter. No shots were heard. No evidence of any shooting found by police. Police systematically clearing school. Investigation is underway. KPD PIO en route to school. More info. shortly.

— Kenosha Police Dept. (@KenoshaPolice) October 4, 2021