A former midshipman was arrested by authorities after allegedly sending an online threat through social media involving the United States Naval Academy in Annapolis, Maryland.

Jackson Fleming, 23, of Chesterton, Indiana, is charged with one count of transmitting a threat in interstate communication, according to a news release from the U.S. Attorney’s Office for the Northern District of Indiana.

Fleming was arrested Friday on suspicion of sending an online threat concerning the Naval Academy the day prior through a social media application, officials said. He was officially charged Sunday.

First responders and police gather near an intersection at the U.S. Naval Academy in Annapolis, Md., during a lockdown following reports of gunfire, Sept. 11, 2025. (WTTG)

While a Naval Academy spokesperson told Fox News Digital on Tuesday they could not comment on a connection between Fleming’s arrest and the security incident, they confirmed Fleming was a midshipman at the Naval Academy from June 30, 2021 to Jan. 5, 2024.

The case is being investigated by the FBI and the Naval Criminal Investigative Service (NCIS), with assistance from the Porter County Sheriff’s Office, according to the U.S. Attorney’s Office.

Fox News Digital’s Emma Bussey, Jasmine Baehr and Lucas Y. Tomlinson contributed to this report.