The ATM looked like it had been broken into, but police did not say how much, if any, money was taken.
State troopers found the machine around 7:23 a.m. near a wooded area behind 1266 Main St. South.
The case is being handled by Southbury police, but detectives from the state police’s Western District Major Crime unit are aiding the investigation.
Anyone who thinks they may have any information regarding the ATM is asked to call Troop A - Southbury at (203) 267-2200, or to text TIP711 with any information to 274637.
All calls will be kept confidential, police said.
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