There were no officers present at the Mandir Marg police station in New Delhi as all of them had been deputed for the PM's visit to the area.
Mr Modi cleaned the police station and told the policemen present that cleanliness was important.
He was visiting the Valmiki Basti, a colony that houses sanitation workers, nearby. At the colony too, Mr Modi took a broom and swept the streets.
He also visited a temple and a house that Mahatma Gandhi lived in.
On Mahatma Gandhi's 145th birth anniversary today, Mr Modi launched a mega Swachh Bharat Abhiyan or 'Clean India' campaign that aims at a cleaner country in the next five years.
He visited the India Gate where he led the country in a cleanliness pledge. (PM Modi Sweeps in a 'Clean India' Movement)