Authorities in Florida arrested a man early Tuesday morning after discovering a loaded AR-15 rifle and several knives inside a rental vehicle parked in a restricted area at a Palm Beach County Airport, according to law enforcement officials.Palm Beach County Sheriff's Office (PBSO) deputies responded around 7:10 a.m. after airport operations staff reported a suspicious individual standing outside a dark-colored vehicle in a secure parking zone.When deputies arrived, they found the man, later identified asMichael Rodrigues, 41, of no known local address, outside the vehicle, reportedly getting dressed. Deputies determined the vehicle was a rental and opened the glove compartment to retrieve the rental agreement. Inside, they found afully loaded AR-15 magazine.A full search of the vehicle uncovered aloaded AR-15 rifleandmultiple kniveshidden beneath a blanket on the seat. The man was taken into custody without incident and is currently being interviewed by detectives.WOMAN WITH 'URGENT MESSAGE' FOR PRESIDENT TRUMP ARRESTED NEAR MAR-A-LAGO SECURITY CHECKPOINTRodrigues has not yet been formally charged, but the investigation is ongoing. Authorities are working to obtain a search warrant for further examination of the vehicle and any related evidence.'COWARD' FACING CHARGES, ACCUSED OF TARGETING FEDERAL AGENTS WITH FIERY ATTACK AT LOS ANGELES HOTELThe airport is known to be used by President Trump, though officials confirmedTrump is not currently in Florida.A law enforcement source tells Fox News that no threats have been made and the motive behind the incident remains unclear at this time.This is a developing story. Check back for updates.