The Singapore unit of MF Global Holdings Ltd., the bankrupt firm once run by Jon S. Corzine, was sued by seven former employees, including the head of sales for Asia, seeking information on the unit's financial status, Bloomberg News reported today. "The response from the provisional liquidators was very frustrating," Michael Joseph Drennan, former head of sales for Asia, said in his complaint filed with the Singapore High Court. The legal action by the seven former employees in Singapore, who claim in court papers they are owed at least S$3.5 million ($2.8 million) by MF Global Singapore, follows a suit in London. Employees of MF Global's U.K. unit are seeking 39 million pounds ($63 million) of unpaid bonuses, severance pay and pension contributions from its administrator KPMG LLP.