The documents are said to have leaked to a pro-Iranian Telegram channel and are claimed to come from a department within the US Department of Defense.
The leak is said to contain information about ongoing surveillance of Israel's preparations for a retaliation against Iran, which on October 1 carried out a large-scale drone attack on Israel.
The information was gathered on October 15 and 16, and includes, among other things, preparations for an Israeli drone attack. It is still not entirely clear whether the documents are authentic or how and why they leaked, reports the news agency AP, citing three anonymous government sources. A fourth source says the documents appear to be authentic.
According to the Israeli newspaper Haaretz, the US has apologized to Israel for the leak.
The documents were stamped as top secret and were prepared by two authorities, one of them the National Security Agency (NSA). Documents of that type are usually shared in a circle of five countries, in addition to the US, also Canada, the UK, Australia, and New Zealand.
Iran fired around 200 drones, some of them hypersonic, in a comprehensive attack on Israel on October 1. Iran described it as revenge for, among other things, the death of Hezbollah leader Hassan Nasrallah.
