More than 10,000 federal employees could have access to data revealed by a secretive government surveillance program that has come under scrutiny because of alleged abuses, lawmakers were told by U.S. inspectors general.

At an April 27 House Judiciary subcommittee hearing, lawmakers heard from a panel of three witnesses associated with the U.S. Office of the Inspector General (OIG) responsible for oversight of the Foreign Intelligence Surveillance Act (FISA). The legislation gives intelligence agencies broad powers to conduct surveillance on foreigners suspected of spying for a foreign power or belonging to a terrorist group.

However, bipartisan concerns have been raised because the program also has the ability to collect information about U.S. citizens.