Jack Teixeira, a 21-year-old member of the Massachusetts Air National Guard, was arrested by federal authorities in connection with their investigation into classified documents that were leaked on the internet, writes NBC NEWS.

FBI agents took Teixeira into custody Thursday afternoon “without incident”, Attorney General Merrick Garland announced in brief remarks at the Justice Department, which has been conducting a criminal investigation.

“Today, the Justice Department arrested Jack Douglas Teixeira in connection with an investigation into alleged unauthorized removal, retention and transmission of classified national defense information. Teixeira is an employee of the United States Air Force National Guard”, Garland said.

Teixeira will have an initial appearance in U.S. District Court for Massachusetts, said Garland, who added that the investigation is ongoing. He declined to take questions from the media.

FBI agents arrested Teixeira at a residence in North Dighton, Massachusetts, the bureau’s office in Boston said in a statement. The residence is more than an hour from the military base where he worked.