At least four people were killed in a massive traffic accident Tuesday on a highway between Dubai and Abu Dhabi, police officials said. Dozens of people were injured in the accident, which involved more than 50 vehicles, said the Abu Dhabi officials, speaking on condition of anonymity because they were not authorized to talk to the media. Police said thick fog was the cause of the accident, which took place during rush hour on the highway between the Emirates' two main cities. Authorities cordoned off the site of the accident, backing up traffic for miles, the officials added. __
