A man is being treated in hospital after allegedly throwing a brick at a charity office window which rebounded and hit him on the head.
Several windows were smashed in the late-night attack on the Belfast offices of Public Initiative For Prevention of Suicide and Self Harm (PIPS) on Wednesday.
Police responded to a report of a man breaking windows at the Antrim Road property at 8.25pm.
A man, who is in his 40s, was arrested on the scene and is being treated in hospital for a head injury, the Belfast Telegraph reported.
Police are continuing their enquiries into the vandalism.
There were a number of people in the property at the time but none were injured.