NEW YORK, April 11. /TASS/. The leak of the classified US documents that have surfaced on social media may have come from the Central Intelligence Agency or the National Security Agency, Fox News reported on Tuesday.

The television channel reported that most of the documents that are circulating on the Internet are part of the Pentagon’s briefings that are delivered electronically on secure iPads to up to 5,000 people. However, some of the classified intelligence published online appears to have been produced by the CIA or the NSA, rather than the Pentagon, Fox News reported. That intelligence wasn’t part of the Pentagon’s briefing books and can be accessed by a more limited number of people.

US news media earlier reported that the Pentagon and the US Department of Justice started an investigation into the leak of the classified documents that are related to the plans of NATO and Washington to make Ukrainian forces ready for a counteroffensive. A large number of materials disclosing the schedules of weapons supplies and troops numbers were posted to Twitter and Telegram, among other social media. The New York Times reported on April 7 that another portion of classified US documents relating to Ukraine had surfaced on the Internet. Reuters reported it could be the most significant data leak since more than 700,000 documents, videos and diplomatic cables were posted on WikiLeaks in 2013. The report also said the latest leaks circulating on the Internet could be fake.