KUALA LUMPUR, April 16 -- Actor Kim Soo-hyun's agency Goldmedalist has taken legal action against online users and a far-right YouTube channel over alleged defamation, blackmail and stalking.

The company filed police reports against malicious posts and lodged criminal charges against the YouTube channel Hoverlab.

According to a report by Korea JoongAng Daily, the agency said, "Malicious posts, comments and false rumours are rapidly spreading online against our artist Kim Soo-hyun."

"Malicious insults, spreading false rumours, personal attacks and sexual harassment are not a joke but serious crimes. We have made reports to authorities regarding these hostile activities, thanks to fans' active measures," it added.

The agency also vowed ...