BUENOS AIRES, Argentina, Feb 7 (Reuters) - A passenger tried to force his way into the cockpit of a United Airlines flight from Miami to Argentina on Thursday, but was restrained and arrested when the plane touched down in Buenos Aires, the airline said. Local media reports identified the man as a Uruguayan but that could not be immediately confirmed. Officials did not say whether he was armed. The Argentine air force said he appeared to be "mentally disturbed" and had been overpowered by the crew of United Airlines Flight 855. "The crew were successful and advised Ezeiza (Buenos Aires' international airport). A special group of aeronautical police entered the plane, took him prisoner and notified a judge," said air force spokesman Jorge Reta. United Airlines (UAL) issued a statement saying it had advised the FBI and Interpol about the incident.