Yahoo said U.S. law enforcement agencies made between 12,000 and 13,000 requests for data in the last six months, the latest in a series of disclosures by technology companies. During December 1, 2012 and May 31, 2013, Yahoo received between 12,000 and 13,000 requests, inclusive of criminal, Foreign Intelligence Surveillance Act (FISA), and other requests. The most common of these requests concerned fraud, homicides, kidnappings, and other criminal investigations.

Like all companies, Yahoo says it cannot lawfully break out FISA request numbers at this time because those numbers are classified. However, Yahoo CEO Marissa Mayer is urging the federal government to reconsider its stance on this issue.

Technology companies have been under pressure to disclose the precise nature of their cooperation with the U.S. National Security Agency (NSA) after leaked documents showed it had been acquiring consumer data from them for years.

Apple, Microsoft and Facebook have also disclosed the number of data requests they received from U.S. law enforcement authorities. All these companies have denied the NSA had any direct access to their servers and said consumer data was only handed over if the request was in the form of a court order.