A high school in Russia's St. Petersberg city Thursday witnessed an evacuation of about 400 people, following a prank call which warned of mines planted on the school grounds.
After a thorough inspection by local bomb disposal teams and anti-mine specialists in this north Russian city, the school was declared mine-free and reopened around 1.30 p.m. local time (1030 GMT).
Investigators could not immediately identify the caller.