Thieves stole 15 laptop computers after breaking into a school in Moulton, near Newmarket.
The intruders forced their way into the property on School Lane by smashing a window between 6.30pm on Monday and 6.30am the following day.
The computers were taken from an insecure cabinet.
Anyone with information should contact PC Nick Chapman at the Mildenhall Response team quoting NE/13/83, or call Crimestoppers on 0800 555 111.
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