Update — Police say the bomb dog test was negative.
South Iredell parents told WCNC the students planned a senior prank and put alarm clocks in their lockers.
IREDELL COUNTY, N.C. — South Iredell High School is being evacuated after a possible explosive device was found in a locker, deputies said.
The school resource officer found the device, according to a report.
Read more: WSOC