Internal documents related to the government's so-called secret funds have revealed that some 90 percent of such expenditures were disbursed without receipts under the discretion of chief Cabinet secretaries, a lawyers' group said Tuesday.

The documents mark the first public release of details about the covert funds, which are used for intelligence gathering and other activities deemed to be in the national interest.

The move follows a ruling by the Supreme Court in January ordering the state to disclose documents related to the funds. The top court limited the disclosure to those that do not carry information on how and for whom the funds were used.