Trainer John Moore had his own personal security guards at Happy Valley races yesterday after receiving a number of harassing telephone calls during the week. Jockey Club executive director of security Stephen Chandler personally headed the investigation into the campaign of harassment of the new season trainers' premiership leader before calling in the police. However, despite police involvement and the presence of two security guards following Moore from a 10 metre radius, Chandler played down the matter as 'relatively minor' and denied they had constituted death threats. 'John Moore does not believe it is too serious and I also don't believe it will prove to be a serious threat,' Chandler explained last night. 'However, things like this have a nasty habit of becoming much bigger problems if they are not dealt with firmly from the outset and that's been my approach here. 'The police will be using their resources to check telephone records and it is my belief the perpetrator will be apprehended and dealt with according to the law. 'As far as having security guards looking after John here today, while we believe it to be a low-grade threat, it's better to be safe than sorry.' There were unsubstantiated rumours of another trainer having received threatening phone calls, which were fuelled when Dennis Yip Chor-hong failed to attend the once-a-year Sunday fixture at the city venue. 'We have not heard from Dennis Yip about anything of this nature, and I'm confident he would contact us if he had a worry,' Chandler continued. 'However, with the publicity this incident will generate, some copycat harassment is not out of the question.' Moore had a poor day at the office, failing to draw a winner from 11 races. Worse than that, he went to the mounting yard to welcome back Dim Sum as the winner of the main race - ironically called the Police Cup - only to find a head-bobbing photo finish had gone against him and victory went to High Point by a nose.