Security arrangements for a top-level international conference next month remain uncertain after police revealed they had not been told about the arrival of delegates requiring VIP protection. The Asia Society, organisers of the ninth annual Corporate Conference in Asia, say the keynote speakers have confirmed they will attend the May 6 to 8 meeting. The speakers are Pakistani Prime Minister Nawaz Sharif, Vietnamese Deputy Prime Minister Nguyen Manh Cam and former Pakistani prime minster, Moeen Qureshi. But police sources and Protocol Division chiefs say that with less than a month to go, they have been given no information on who will attend. A police source said: 'We don't normally conduct negotiations about this sort of thing through newspapers but until you told us we knew nothing about it. 'I'm not saying we couldn't handle it but if they're coming we would have liked to have been told by now.' Publicity material for the event, at the Hong Kong Conference and Exhibition Centre, also lists Chief Executive Tung Chee-hwa, the President of the Asian Development Bank, Mitsuo Sato, and former US trade representative Carla Hills as confirmed speakers. Prime Minister Zhu Rongji and South Korean President Kim Dae-jung have been invited but reportedly have not yet accepted. A spokesman for the Protocol Division played down the delay but admitted it would have liked to have known earlier. 'So far we have not been informed by the relevant consulates about who is coming and who isn't,' he said. 'There's still time and once they inform us we'll inform the necessary departments for making arrangements.' The Asia Society in Hong Kong referred inquiries to its New York office. A spokesman there, Janet Gilman, said she was unaware of any problems and said the society was used to liaising with local police whenever it held a conference of this nature. She admitted there may have been some confusion over which VIPs had accepted and which had not. Top-level visitors are guarded by the VIP protection unit which refused to comment for security reasons.