A police dog tracked a suspect into a wooded area after a burglary in Park Street.
Police were called at 4.07am on Friday, August 31, after a man was seen smashing a window to break into a house on Birchwood Way.
Officers attended alongside the Bedfordshire, Cambridgeshire and Hertfordshire Dog Unit.
One suspect was caught at the scene while two others ran off. They were tracked by police dog Sia, who followed them into a wooded area, and were then arrested.
Three people have been arrested on suspicion of burglary: a 21-year-old woman from Park Street, and a 33-year-old man and a 36-year-old man from Watford.
All three suspects have been bailed.
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