[article] UPDATE: An unidentified flying object which ruined the travel plans of passengers at Bremen airport on Monday night looked like a plane but was a lot louder, according to eyewitnesses. The airport said on Monday night that the UFO showed up on its radar several times over three hours from 6.30pm to 9.30pm. Police said in a statement that they were alerted at 6.30pm about a UFO over Bremen and a patrol car also saw the object. A police helicopter was sent up to try and find the UFO but could not, although the Weser Kurier newspaper reported it could be seen through binoculars from the airport's traffic control tower. The helicopter search was called off at 8.45pm, according to the police statement. Officers are now investigating the case on grounds of unauthorized intrusion into controlled air space.