Police are looking into a suspect behind an internet post threatening to go after former People Power Party chief Han Dong-hoon with a knife, officials said Monday.The Chungbuk Provincial Police Agency said it received a report of an online post titled, "I'm going after Han Dong-hoon with a knife," on an internet community early Monday.The suspect reportedly uploaded a photo of Han with former Land Minister Won Hee-ryong and said, "I'm on my way to seek revenge with an egg and a knife," at 10:50 a.m., according to police.Police plan to hunt down the suspect by tracking down the IP address, which is the online equivalent of a street address or a phone number.Meanwhile, police have deployed a patrol car near Han's residence for protective measures.Source: Yonhap News Agency