Almost 100 people have been charged as a result of a police crackdown on graffiti over the past week.
Police have laid 343 charges against 90 alleged graffiti vandals and criminals since Operation Eraser 9's launch last Monday.
Acting Supt Mary Brown thanked the community for their assistance in helping identify vandals and bring them to the attention of police.
Those recently arrested include a boy, 15, who allegedly tagged the Joondalup War Memorial last week.
A 17-year-old boy faces 21 criminal damage charges and a 15-year-old boy has been charged with six graffiti offences.
He is also the subject of an investigation into a further 123 incidents.
Catching juveniles before their offending escalates has been one of the long-standing objectives of Operation Eraser.