All actors in Ashok Pandit's new film - aimed as a wake-up call following the 7/11 train bombings in Mumbai - are working for free.

The short film advocates security measures in the wake of last month's serial blasts.

"It's a film to generate awareness post-7/11. We have to be even more vigilant now. We are voluntarily doing it for the Mumbai police, to help them with this cause," said actor Atul Kulkarni, who is also involved with the film.

"It has a social message, which says if you find any unidentified object or suspect something untoward, please call the police," he said.