A garden ornament was thrown through a rear double glazed door in an attempted burglary in the Shenley Lodge area of Milton Keynes.
It happened between 6.15pm and 6.30pm on Thursday when the offenders attempted to gain entry to the property by throwing the garden ornament through the door.
This activated the alarm and the offenders fled the scene. Nothing was stolen.
If you have any information or noticed any suspicious behaviour in the area, contact detective constable Chris Oakman of Milton Keynes police station on 101.