Dileep told Malayalam news channels that he filed the complaint with the Director General of Police on April 20 along with evidences of blackmailing allegedly with the knowledge of prime accused Pulsar Suni.
"Truth should come out. No one in the filed of cinema should face such a situation," he said.
Dileep's friend and film director Nadirshah said a man named Vishnu from Edappally in Ernakulam, claiming to be the friend of Suni, had telephoned him seeking a huge amount from the actor.
Nadirshah claimed Vishnu has also offered to give him money for helping to trap Dileep in the case.
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The revelation came in the wake of media reports that police is planning to reopoen the abduction and assault case. Police, however, remained tight lipped on the issue.
Meanwhile, local media published a copy of a letter said to be written by Suni to Dileep.
PTI could not independently verify the veracity of the letter.
Earlier, Dileep slammed a section of the media for "targeting" him in connection with the alleged abduction and harassment of the actress by a gang of men on February 17.
Dileep, who recently got married to Malayalam actress Kavya Madhavan,had said he did not have any contact, directly or indirectly, with any of the accused involved in the "heinous crime."
Meanwhile, Congress MLA P T Thomas demanded a CBI probe into the actress assault case.
Six persons, including 'Pulsar' Suni, Martin and Vigeesh were arrested by police in connection with the incident.
The actress, who has worked in Tamil and Telugu films, was abducted and allegedly molested inside her car for two hours by the accused, who had forced their way into the vehicle on the night of February 17 and later escaped in a busy area in Kochi.