Vandals have used a rock and a glass of paint to smash a window at Immigration Minister's Peter Dutton's electorate office.

A police spokeswoman said a man and a woman threw the objects through the window of Mr Dutton's office at Strathpine, north of Brisbane, around 9:45pm on Friday.

Three people were inside the office at the time but none were injured.

Police are investigating the incident.

AAP