Police are appealing for witnesses after a kitchen window of property in Y-Vaarney-Yiarg, Castletown was broken with a grey breeze block.
It happened at around 8pm on Wednesday last week, January 30.
The residents were at home at the time.
Officers say the brick is thought to have been removed from a car park nearby and thrown directly at the window, cracking the glass.
Call Castletown police on 822222, or police headquarters on 631212, if you have any information