Clovis police are investigating vandalism at Sierra Vista Elementary School on Sunday evening.
A spokeswoman said that at least one person entered the multipurpose room in the school on the southwest corner of Barstow and Pollasky avenues about 8:30 p.m.
A glass trophy case was broken into and two trophies were smashed. Several fire extinguishers were used to blanket the room with chemicals and a fire alarm was pulled.
Police say physical damage to the room was minor but the cleanup would be extensive. The room was not available for use Monday.
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Anyone with information about the vandalism is asked to contact police at (559) 324-2800 or Crime Stoppers at (559) 498-STOP.