Stunt men Anil and Uday (pictured right) were not wearing lifejackets

The police say the two were not wearing any harness or life jackets, and some on the sets believe they couldn't swim all that well."Duniya Vijay had a life jacket but the other two did not," senior police officer Chandragupta told NDTV.

Police sources say the filmmakers and crew may be charged with negligence. There were no rescue boats or life jackets at hand. A team of expert swimmers and officials reached the spot only later.A small boat with life jackets had been positioned close to the spot where they jumped. It is being investigated why it failed to save the men.