Video shows rescue workers searching for survivors after a container ship crashed into a control tower in the Italian port city of Genoa.<br/> <br />The video was released by the Italian fire service on Wednesday.<br/> <br />At least six people were reported killed, while three people were still missing.<br/> <br />Officials said four others had also suffered injuries-- two seriously.<br/> <br />The tower, which was more than 50 meters high, collapsed after being struck by the prow of the Jolly Nero ship.<br/> <br />Rescue efforts were ongoing.<br/> <br />The accident happened as staff were changing shifts, so more people than normal were in the tower.<br/> <br />Three people were believed to have been trapped in the lift of the control tower and may have fallen into the sea.<br/> <br />The cause of the crash was unclear.<br/> <br />It occurred at about 11 p.m. on Tuesday in calm conditions.<br/> <br />Prosecutors boarded the vessel and have opened an investigation into the accident, local media reported.
