The raids, on a paint supplies store in Newtown and a record store in central Sydney yesterday afternoon and evening, uncovered the material, which showed people committing acts of graffiti.

Chief Superintendent John Hartley said the swoop was part of an ongoing operation targeting graffiti and vandalism on CityRail trains.

“NSW police is working in conjunction with Rail Corp to reduce the incidents of graffiti upon the rail network,” Chief Supt Hartley.

“The cost of graffiti runs into the millions of dollars and also contributes to considerable delays to the public transport system.”

The state opposition last month slammed the government’s rail security program following a 300 per cent jump in graffiti last year.