The leader of a youth gang whose random attack on two teenagers left one of them partially paralysed was yesterday jailed for 11 years. Wong Yat-fung, 24, admitted leading a group of 20 youngsters to attack Lee Kwong-pan, 15, and Yu Siu-wai, 17, who were walking a dog shortly before midnight on June 5 last year near Yat Tung Estate, Tung Chung. Wong had pleaded guilty in the Court of First Instance to a count of wounding with intent and one of wounding. Passing sentence, Mr Justice Michael Stuart-Moore called the attack on two unarmed youngsters 'senseless and motiveless'. Because of his severe brain injury, the court heard, Lee could now speak only in single words, was unable to move the right side of his body and would be restricted to a wheelchair for the rest of his life. Yu's injury was less serious and did not require hospitalisation. The victims did not know why they had been attacked. The judge said Wong's crime was made more serious because he had committed it while on bail pending trial in the District Court for similar offences. That case ended with a 44-month jail sentence in July last year, for wounding with intent and common assault. Wong's latest sentence will be served consecutively. Commenting on his previous offence, which involved a fight over two women in a restaurant, the judge said Wong was unable to curb his violent disposition. In mitigation, Wong's lawyer argued that the case did not involve the most serious forms of violence because a flashlight rather than a chopper had been used. Although Lee had suffered a serious injury, it was the result of only one blow. The lawyer also argued that the attack was unlikely not to have been provoked, as footage filmed by a resident of the estate showed two groups arguing with one another and a rubbish bin being thrown back and forth. The court could not establish whether the footage was filmed before or after the attack on the teenagers.