One is labeled 'Top Secret,' and is titled 'Status of the Conflict as of 1 March.' It gives a detailed battlefield summary on that particular day, though it's not clear why the documents are emerging now, more than a month after they were prepared.

The online posts show photos of physical documents that were folded and creased in some instances.

The documents include maps of Ukraine and charts on where troops are concentrated and what kinds of weapons are available to them. The Department of Justice has opened an investigation into the leaks and has been in communication with the Department of Defense, DOJ spokesperson Xochitl Hinojosa told NPR in a statement. 'We are aware of the reports of social media posts and the department is reviewing the matter,' said Pentagon Deputy Press Secretary Sabrina Singh. The revelation set off alarm bells at the Pentagon, which is trying to determine how the material was leaked or stolen. Top-secret Pentagon documents with details about the war in Ukraine have been published on at least two social media sites, Twitter and Telegram. Ukrainian troops prepare to fire a mortar toward Russian positions on the frontline in the eastern region of Donetsk on Wednesday.

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