At least four officials related to the Lehman Brothers minibonds debacle will be called upon to face a Legislative Council subcommittee in the first round of questioning, it was decided yesterday. After a closed-door meeting by the Legco subcommittee set up to investigate the issue, its chairman, Raymond Ho Chung-tai, said members had decided to call the secretary for financial services and the treasury, Chan Ka-keung, his deputy, Julia Leung Fung-yee, and the Hong Kong Monetary Authority chief executive, Joseph Yam Chi-kwong, and a deputy. However, another committee member, Kam Nai-wai of the Democrats, said he also expected Financial Secretary John Tsang Chun-wah, as well as a representative from the Securities and Futures Commission, to be called to answer questions about the matter. Dr Ho also said the subcommittee would ask for details omitted from the SFC and HKMA reports released on Thursday, and 'make a decision as to whether the non-disclosure was justified or not'. The Legco subcommittee has been granted special powers and privileges allowing it in effect to summon witnesses and documents for the inquiry as well as have witnesses testify under oath. When Lehman collapsed, 43,700 Hong Kong investors were left holding derivatives it had issued or guaranteed but which had lost much or all of their value. Most were minibonds, which, despite their name, are complex, credit-linked derivatives. Investors claim banks and brokers mis-sold the products as low-risk.