Ajay Devgn and Rohit Shetty have been shooting round the clock to complete work on their film 'Singham Returns'. After a packed schedule in Mumbai, the duo went off to Goa. They reportedly had a 15 days shooting schedule there too. However, according to industry buzz, Ajay and Rohit are completing work at blitzkrieg speed. The duo is working hard to meet the release date of August 15. 'Singham Returns' will have the sizzling beauty, Kareena Kapoor opposite muscled hunk Ajay Devgn. Apart from 'Singham Returns', Ajay is also working on the schedule of 'Action Jackson'.