White supremacist graffiti sprayed on a fence in Mandurah has been swiftly removed by council workers.

The offensive slogans, which included "KKK" and the Nazi swastika, appeared in the Mandurah suburb of Greenfields this week.

The racist graffiti appeared in Greenfields this week.

Within hours the "white power" vandalism had been sprayed over.

City of Mandurah chief Mark Newman said the City was disappointed by the "offensive act of graffiti vandalism", and called on community assistance to stamp out similar racist attacks.