Undercover police managed to breach security at the Olympic equestrian venues in what a senior officer likened to 'Trojan Horse' manoeuvres. Using disguises and false documents they conducted 'security audit' measures looking for loopholes at the Beas River and Sha Tin venues before and during the events. Police Senior Superintendent Albert Chan Kin-hung, head of the police planning team for the 2008 Olympic and Paralympic Equestrian events, said the aim was to find and block loopholes before problems emerged. Mr Chan did not disclose how many times the officers breached security or where but he said that on one occasion an officer in a car was able to gain entry using a fake permit. 'It was just like the men in the Trojan Horse,' he said. Other officers had tried to climb over the fences, he said, without disclosing whether they were successful. The organiser, the Hong Kong Equestrian company, which employed its own security guards, was responsible for security inside the venues while police were in charge of security and crowd control outside. Police also mounted strict controls over grooms' accommodation which was close to the competition venue.