The cases were detected by passive and active surveillance activities.
Eighteen of these were detected during active surveillance activities and, thus, were excluded from the analysis.
"The White House believes other surveillance activities were used," he said.
But security officials are arguing strongly against curtailing the substance of domestic surveillance activities.
Systematic control and surveillance activities have been the main route towards elimination across the continent.
Intelligence officials insist that "technologically complex" surveillance activities will always be prone to human error.
In the mid-1970s, Congress, for the first time, investigated the surveillance activities of the US government.
But Inman said it was "a problem" that intelligence officials had at times mischaracterized the extent of their surveillance activities.
Pelosi was one of very few legislators briefed about the expansions of NSA surveillance activities after 9/11.
Here are some of the key findings: All the surveillance activities of the intelligence agencies are lawful and proportionate.
A statement from the Senate Intelligence Committee, which has oversight of FBI surveillance activities, is expected later.
