Delhi Police on May 18 brought businessman Navneet Kalra to Khan Market for investigation. A Delhi court on May 17 sent Kalra to 3-day police custody in connection with a case relating to the alleged hoarding of oxygen concentrators in a restaurant in South Delhi. On May 07, Delhi Police had busted an oxygen concentrators black-marketing racket during a raid and recovered 105 such concentrators from two upscale restaurants in the city’s Khan Market area. The two restaurants namely Khan Chacha and Town Hall are owned by Navneet Kalra.