The NSA’s Prism program has been used to intercept phone calls and text messages, but the NSA also has been collecting metadata on users, including their IP addresses, the content of messages and the locations of their computers.
The revelations are coming after the New York Times revealed that Google, Yahoo and Microsoft had been tapping into the NSA’s internet backbone to collect data on users without their knowledge.
A government document leaked to the New Yorker also revealed that the NSA was intercepting the communications of “millions” of people a year.
The Guardian has revealed that many of the surveillance programs are run by the US Defence Intelligence Agency (DIA).
The NSA says it is using the tools to prevent cyber attacks and to “protect our national security”.
The US has repeatedly said it is not collecting data on Americans, only foreigners.
The Washington Post, which first reported the Prism revelations, has since confirmed that some NSA programs target foreigners.
But it is still unclear whether the agency’s data collection is being used to target Americans or to target foreign targets.
The Prism revelations come after a leaked document revealed that foreign spies in Europe and Asia are using the NSA to track targets and intercept their communications.
The US intelligence community says it does not use Prism to target people overseas.
In a statement to the Washington Post on Friday, a DIA spokeswoman said the agency did not collect data to target individuals.
“It is clear that the DIA uses the tools in Prism to prevent adversaries from using technology to attack the United States,” the spokeswoman said.
“The DIA does not collect or use the data to monitor individuals for the purpose of targeting them.”
The NSA declined to comment on the Prism disclosures on Friday.