Director Mani Ratnam's 'Kaatru Veliyidai' has released over the weekend and the film has taken a tremendous opening in Chennai and other parts of Tamil Nadu. The film has however received mixed reviews from critics and fans.

There is a sequence in the film where, the Indian prisoners Karthi and his two friends escape from Pakistan Prison and their Army Men. Some online reviewers are quizzing about the authenticity of this sequence. They said this escape sequence was highly cinematic and unbelievable.

However what seemed unbelievable to those reviewers is in fact something that has happened in the real life of someone in the past. The makers have now revealed the incident based on which this sequence was written and shot.

When Flight Lieutenant Dilip Parulkar was shot down over Pakistan on 10 December 1971, he quickly turned that catastrophe into the greatest adventure of his life. On 13 August 1972 Parulkar, along with Malvinder Singh Grewal and Harish Sinhji escaped from a POW camp in Rawalpindi. Four Miles To Freedom is their story.

"Four miles to freedom" is a book written by Ms.Faith Johnston. It depicts their real story. 'Kaatru Veliyidai' borrows incidents from this book.Most of what Karthi and his friends do to escape are from real incidents.

So, this should put an end to people who question the authenticity of this sequence and the confusion surrounding this sequence.