A SECOND suspected sex attacker has been arrested in Tuen Mun. The alleged assailant was spotted by the father of a woman who had earlier been sexually assaulted in Tuen Mun Park. He was arrested by police who responded to emergency calls made by the father after he spotted the man lurking near the area where his daughter had been assaulted. Following an attack on his daughter earlier this year, the father had been escorting her from their home in a nearby block of flats to the LRT station near the park every day. The 30-year-old suspect, who lives in Tuen Mun with his wife and family, was then arrested by the police. According to one police source, the man who called the police would be recommended for a good citizens' award for his vigilance. When asked about the latest arrest, Assistant District Commander, Superintendent Ray Pierce called for women who had been attacked in the area to come forward. ''Single women travelling by the park have been attacked and robbed, and a number of sexual assaults of varying degrees of severity have taken place,'' Superintendent Pierce said. ''We are appealing for women who have been attacked to come forward and report it.'' Tuen Mun was previously plagued by an alleged rapist and murderer for more than a year. The previous attacker preyed on solitary women returning home to high-rise apartments in the early morning hours. A man is awaiting trial in connection with the series of sex attacks. A sex attacker has also struck at the nearby new town of Tin Shui Wai, where at least four pre-teenage girls have been raped and assaulted this year.