Entrepreneur Tehseen Poonawalla claimed that he has been placed under house arrest at his south Delhi home ahead of his planned solo march, vow of silence and hunger strike at Gandhi Smriti against ethanol-blended petrol. Delhi Police had earlier denied permission for Poonawalla to organise a 'Gaadi March' in central Delhi. "No papers, nothing! I'm under house arrest," Poonawalla said.