The Democratic Party would refuse to approve about $100 million in 'secret funding' if officials did not explain what it was for, a legislator warned.
James To Kun-sun told a special Finance Committee meeting the money was listed as recurrent expenditure for the police under the sub-heading 'rewards and special services'.
He said he was angry that the Secretary for Security had refused to give details of the $106.1 million sum, even behind closed doors.
Mr To said the party's 13 legislators would seek to cut the sum from the Appropriation Bill on March 31 if the Government failed to provide an explanation.
The ultimatum came after Commissioner for Police Eddie Hui Ki-on declined to disclose the number of people who had received rewards in the past five years.
In a written reply dated March 11, Mr Hui said: 'No statistics on the number of people who received rewards are kept, therefore we cannot provide the information as asked.'