GTY_lagos_airport_sk_140908_16x9_992A federal air marshal is in quarantine in Houston today after being attacked last night by an unknown assailant at the Lagos, Nigeria airport wielding a syringe. U.S. law enforcement officials told ABC News they were alarmed by the bizarre, unprovoked attack because the assailant was apparently able to inject an unknown substance into the back of one of the air marshal’s arms. The air marshal was traveling with a team of other marshals when the attack took place in an unsecured area of the airport terminal in Lagos, the officials said. He was able to board the United Airlines flight to Houston he was scheduled to work and was met early this morning in Houston by FBI agents and health workers from the Centers for Disease Control (CDC). Amid fears the substance could contain some form of the Ebola virus, the air marshal was immediately put into quarantine. The FBI said he was screened “on-scene… out of an abundance of caution.” An FBI spokesperson said, “The victim did not exhibit any signs of illness during the flight and was transported to a hospital upon landing for further testing. None of the testing conducted has indicated a danger to other passengers.” More