Police arrested 24 people during a raid on an abandoned hair salon used as a 24-hour drug den in Yau Ma Tei. The operator of the den, thought to have been run by the 14K triad gang, later admitted 30 packs of heroin worth $5,000 had been flushed down the toilet as officers tried to break down the door into the Shanghai Street premises on Thursday night. Police found one gram of heroin and drug paraphernalia inside.