The shooting of Power Star Pawan Kalyan's new movie Gabbar Singh is progressing at brisk pace in 'Maryada Ramanna' house set at Kokapet. Director Harish Shankar is filming patch work scenes and climax  action episodes on Pawan Kalyan, Ajay, Brahmanandam, Tanikella Bharani and others. Reportedly, Pawan Kalyan was supposed to shoot for the entire day but left abruptly due to sudden rise of mercury levels. He will join the unit  tomorrow and continue to work till afternoon, says production hands. Shruti Hassan is playing the love interest of Pawan Kalyan, while Ali is essaying the role of Samba. The movie is slated for May 9 release.