'Running Man' cast members HaHa and Lee Kwang Soo have stepped forward and warned fans of people posing as 'Running Man' staff members.

HaHa retweeted several tweets made by the 'Running Man' staff. One read, "To those who have been pretending to be 'Running Man' staff in Paju and Gimpo! There is absolutely no filming for 'Running Man' scheduled on the 6th and 7th. We are planning to request for an investigation on this issue. Please do not fall for this. Spread the word."

HaHa added, "I heard they're even trying to get the students to get into the car! They're imposters! I'm retweeting this to warn everybody."

The singer also retweeted the post, "Please spread the word. To everyone who loves 'Running Man', please do not get fooled. I heard they're even carrying t-shirts with name tags on them, so please be careful."

Taken aback by the issue, Lee Kwang Soo also warned his followers by writing, "There is no filming for 'Running Man' today... And we never cast people off the streets and ask them to get into the cars. I don't know exactly why there are imposters, but please be careful. What a scary world..."

Along with the posts, several photos of a fake mission paper with the title 'Running Man episode 113' and a fake 'Running Man' vehicle have surfaced.

Netizens have reacted commenting, "Is this a new method of kidnapping?", "Wow, this gave me the goosebumps", "Don't ever get in cars of strangers", and more.

Source & Image: Newsen via Nate