Although Government House has closed-circuit television and a police post, a group of youngsters managed to penetrate the security around Chief Executive Donald Tsang Yam-kuen's residence. They were not angry protesters demanding a dialogue with him but friends of a live-in housekeeper who were there for a party. The Chief Executive's Office said the visitors had entered unauthorised areas and it would follow the case up after internet users enthusiastically discussed pictures taken at the gathering. More than 40 photographs have been circulating on the internet since Saturday showing about 10 young people having fun at Government House. The shots showed some of the visitors enjoying a barbecue, posing as the chief executive and a recipient of an award in the ballroom that houses the annual ceremony at which government honours are presented, sitting in a meeting room in the manner of Tsang and his guests, touching ministers' lockers and appreciating the calligraphy of former president Jiang Zemin . A child and a pet dog also appear in the pictures, which were first posted on the social networking website Facebook and later on online discussion boards. By yesterday evening, the posts on the online forum HKgolden.com had drawn more than 900 comments. Some queried why the group had enjoyed the privilege of partying at Government House, while others ridiculed the visitors. The photos on Facebook were removed after heated discussion. Although most of those in the pictures were wearing visitors' badges, a spokesman for the Chief Executive's Office said guests could only enter certain areas when they visited staff at Government House. The friends of the housekeeper had entered unauthorised areas. 'Government House is an august place and visitors should show respect,' the spokesman said, adding that the housekeeper was still working there.