India, Oct. 7 -- South Korean actor Yoo Hae-jin has vowed to take firm action against unlawful conduct after conservative civic groups protested outside his Seoul residence over the controversial historical thriller The Assassin(s), demanding an apology and calling for the film to be withdrawn from theatres.

Agency warns against privacy violations

Yoo's agency, VAST Entertainment, said it was taking the incident seriously and would respond firmly to actions that violate the actor's privacy, threaten his safety or damage his reputation. The agency also said it was collecting online posts and other material to protect his rights and safety against unlawful acts.

The protest took place on Sunday in Seoul's Seongbuk district. Demonstrators a...