France is demanding an explanation over reports that the NSA monitored more than 70 million French phone calls and texts between Dec. 10, 2012, and Jan. 8, 2013.
According to a report Monday in Le Monde, conversations that used certain telephone numbers were automatically recorded, and the surveillance campaign also monitored text messages based on keywords.
The program, code-named US-985D, came to light based on new leaked documents by former NSA contractor Edward Snowden.
It is the latest in a series of revelations about the NSA surveillance program that has targeted numerous countries including Brazil. Brazilian President Dilma Rousseff ordered a series of measures aimed at Internet independence after allegations that the NSA hacked into her communications, as well as the network of state-owned Petrobras oil company.
French officials, including interior minister Manuel Valls, were shocked by the disclosures, and said spying between allies is unacceptable.
Last week, a crowdfunded video produced by Fight for the Future and Demand Progress was released to provide an overview of NSA surveillance, and garner support for the Stop Watching Us rally in Washington, DC.