Massachusetts Air National Guardsman Jack Teixeira is accused of leaking scores of highly classified Pentagon documents, from ones that map out Ukrainian military positions as the country defends against Russia’s invasion to President Vladimir Putin’s possible use of nuclear weapons.

Teixeira, 21, was arrested at his North Dighton home on Thursday by federal agents for allegedly posting these top secret military documents about the Ukraine war and other top national security issues on the social media platform called Discord.

On the web, Teixeira has gone by the name “OG” in the chat group called “Thug Shaker Central,” according to reports.

“Some (documents) featured detailed charts of battlefield conditions in Ukraine and highly classified satellite images of the aftermath of Russian missile strikes on Ukrainian electrical facilities,” The Washington Post reported. “Others sketched the potential trajectory of North Korean ballistic nuclear missiles that could reach the United States.”

“For months, OG regularly uploaded page after page of classified U.S. assessments, offering a window into how deeply American intelligence had penetrated the Russian military, showing that Egypt had planned to sell Russia tens of thousands of rockets and suggesting that Russian mercenaries had approached Turkey, a NATO ally, to buy weapons to fight against Ukraine,” The Post reported.

Teixeira is reportedly a gun enthusiast.

“In a video seen by The Post, the man who the member said is OG stands at a shooting range, wearing safety glasses and ear coverings and holding a large rifle,” The Post reported. “He yells a series of racial and antisemitic slurs into the camera, then fires several rounds at a target.”

Herald wire services were used in this report.