SERIAL sex offenders on the MTR will be punished by having lessons on how to express their sexual desires without resorting to harassment, in new measures announced yesterday. The Deputy Secretary for Security, Carrie Yau Tsang Ka-lai, said the Fight Crime Committee had concluded stricter enforcement and an urgent education programme would cut the number of attacks. A campaign telling women what to do if molested would be launched, Mrs Yau said. It would encourage women to call for help when attacked, as well as telling them to report an assault immediately. She promised emphasis would be placed on training police officers to provide sympathetic support to victims. Undercover officers are also to ride on MTR trains. However, the number could not be divulged 'for operational reasons'. 'Although crime figures are falling, the number of people being sexually harassed is still rising. 'Steps must be taken to stop this trend,' Mrs Yau said. But penalties for sexual harassment would not be changed despite the crackdown. Mrs Yau described existing sentences as 'adequate'. At present offenders typically receive one week in prison. The new initiative did not include a suggestion by the Association for the Advancement of Feminism that separate train compartments be introduced for each sex. There were 124 indecent assaults reported in the MTR last year, up from 100 in 1995. However, police suspect the figure represents just a fraction of the actual number of attacks. Most indecent assaults occurred during morning rush hour between Prince Edward and Admiralty stations.