The United States has begun investigation into an alleged attack of a Federal air marshal by an assailant at the Lagos airport. Mr. Yakubu Dati, General Manager, Federal Airport Authority of Nigeria, confirmed the arrival of the US team. Dati said in a statement yesterday, that the airport authorities had made available CCTV footage of the air marshal’s movement to the US investigators. The general manager stated that the preliminary investigations have shown that the alleged attack never took place. “The attention of The Federal Airports Authority of Nigeria has been drawn to a story making the rounds that a US Marshall was assaulted at the Murtala Mohammed airport, Lagos. “Following the report, a team from the US Embassy met with the airport Joint Security team, and at its request, viewed footage of the movement of the said marshal captured on our CCTV cameras. “Preliminary observation from the CCTV footage did not show evidence of such occurrence. Relevant security agencies have since commenced investigation into the matter,” the statement read. In the statement, FAAN said it continue to ensure the safety and security at Nigeria’s airports. It would be recalled that ABC News reported on Tuesday, that a US air marshal was quarantined in Houston following an attack on Monday night by an assailant, wielding a syringe, at the Lagos airport.