Security was tightened at the Central Government Offices on the day Donald Tsang Yam-kuen formally assumed his position as acting chief executive. Legislators were banned from driving into the west wing and reporters were prevented from entering from 2pm - hours before a special Executive Council meeting was to begin. Steel barriers were also placed inside the premises, with dozens of security guards stationed alongside. The administration wing, which manages the offices and comes directly under the chief secretary, did not say why security had been suddenly tightened. A spokesman for the administration wing said: 'The compound has been reserved for the government's own use this afternoon. Therefore, the compound could not be made available for legislators or other visitors.' He said Democratic Party legislator Andrew Cheng Kar-foo, who was barred from driving his car into the west wing about 2.30pm, had refused an offer of alternative parking in the east wing or the Murray Building. A source said Mr Tsang was dissatisfied with the behaviour of reporters in the past few days and believed the situation was out of control. 'He didn't like reporters pulling and dragging [when trying to do interviews],' the source said. But the source declined to say whether it was Mr Tsang who ordered the tighter security. It would not be the first time Mr Tsang has shown his dislike of being pursued by journalists. In July 2003, he became angry with a journalist who pointed her microphone towards him and hit his mouth while scrambling with fellow reporters to get a sound bite. In the past few days, he has often been surrounded by hordes of reporters. On Thursday, Mr Tsang, a devout Catholic, snapped at a press pack, angry that they had disturbed fellow churchgoers. Mr Cheng said he had called Mr Tsang asking why he was denied access. 'He said there was a special arrangement today and he would not challenge the ... security guards,' Mr Cheng said. 'This reflects the tense and poor relationship between the executive and the legislature.' Legco security panel chairman James To Kun-sun said such tight security was unusual. 'Either there's a serious threat, or Mr Tsang just wants to establish his authority,' said Mr To, adding that if the latter were the case, it presented a poor image to the public.