The city was rocked yesterday by two vicious murders - the beheading of a teenager, apparently by a jilted lover, in a Kwai Chung flat, and the bludgeoning to death of an elderly woman. Police called to the Kwai Chung flat by the victim's former boyfriend found her decapitated body in a pool of blood. The head was nearby. The woman, Li Yui-yi, 19, had suffered more than 20 stab and chop wounds to her chest, neck, head and hands. A bloodstained fruit knife and machete were found beside the body. The former boyfriend, who police said appeared to have been the only other person in the flat on the Shek Lei Estate at the time of the attack, answered the door to police responding to his 999 call. He was then arrested. Police said Li and the man - a 25-year-old they identified as Leung - had been arguing over their relationship since she broke up with him last month. He went to the home that Li shared with her mother and two sisters yesterday morning seeking a reunion. Hooded and handcuffed, the suspect was escorted out of Shek Kai House at about 1pm. Superintendent Anthony Law King-fu, the Kwai Tsing assistant district commander, said investigations indicated no-one else had been in the flat at the time of the murder. Last night, the suspect was still being held for questioning and no charges had been laid. In Shek Kip Mei, 80-year-old widow Ngan Suen was found bound and gagged in her home. She had been bludgeoned to death, and her body had lain in a pool of blood for at least 24 hours before being found. About HK$3,000 in cash, her bank book, identity card and a chain of keys were missing. 'It appears a robbery has gone wrong,' said Sham Shui Po assistant district commander Superintendent Stephen Tarrant. With the two deaths, 10 people have now been murdered in the city this year, compared with three in the first quarter of last year.