New Delhi, Jan 19: Delhi Police on Thursday got removed certain "anti-national" and "Khalistan-related graffiti" painted on a wall in the Paschim Vihar area of the city, officials said. Fringe organisation Sikhs for Justice (SFJ), run by a few radical Sikhs of foreign nationality in the US, Canada, the UK, etc, was declared unlawful by the Union government under the provisions of Section 3(1) of the Unlawful Activities (Prevention) Act, 1967.