Four years ago, party-goers dressed as police officers were reportedly mistaken for the real thing amid a deadly crowd crush in South Korea’s capital. Now, as Seoul prepares for its fourth Halloween since the disaster, police have launched a week-long nationwide crackdown on imitation police uniforms and equipment, aiming to stop any such confusion from happening again. The nationwide operation, announced by the National Police Agency on Sunday, runs until Monday next week. More than 4,500 officers are also being deployed to Itaewon, Hongdae, Seongsu-dong, Myeong-dong and Ikseon-dong to ensure crowd safety, Yonhap reported.