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.PATEL SAYS FBI STOPPED POTENTIAL PRESCHOOL MASSACRE: 'UNACCEPTABLE ACTS OF COWARDICE'The alleged threat, sent on Thursday, appears to coincide with a security incident that happened at the academy on the same day.The Naval Academy was placed on lockdown, and one person was injured while Naval Security Forces were clearing a building.NAVY SAILOR FACES LIFE IN PRISON AFTER SELLING MILITARY SECRETS TO CHINA FOR $12K PAYMENTAccording to an internal email obtained by Fox News from Capt. David Forman, Deputy Commandant of Midshipmen, a midshipman who mistook authorized law enforcement as a threat, engaged and was injured in the process.The initial threat allegedly stemmed from a threat posted on the anonymous chat platform Yodel, and was traced to a separated midshipman at his parents home in the Midwest, Fox News Digital previously reported.INDIANA WOMAN FACES FEDERAL CHARGES FOR SOCIAL MEDIA THREATS TO DISEMBOWEL TRUMPWhile 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 Sheriffs 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.