Divers spent a third fruitless day searching for victims of a deadly bridge collapse, finding no bodies inside a crushed car pulled earlier from the murky Mississippi River waters. Authorities said they had been unable to check at least one other car lying beneath another vehicle on the river bottom. They planned to return to work Sunday with sonar equipment to scan areas upriver and downriver. An examination of a car lifted onto a barge Saturday "did not find anything in the vehicle in terms of victims or human remains," said Hennepin County Sheriff Rich Stanek. Police also released an official list Saturday of the eight people reported missing, matching estimates that had been lowered from the hours immediately after the collapse. The official death toll is five. In releasing the list, police cautioned that the number could still rise, saying it is possible some victims have not been reported missing. Investigators have names that have not been connected to the bridge, and divers and recovery workers have found license plate numbers that do not belong to an identified missing person or survivor, authorities said. A detailed examination of the wreckage around the southern end of the bridge led investigators to conclude "that is probably not where the event began," said Mark Rosenker, chairman of the National Transportation Safety Board. The southern end shifted 25 meters during the collapse. As a result, he said, investigators will use a helicopter mounted with a high-resolution camera - equipment like that used by Hollywood film crews - to look for points where the metal was cut, sheared or pulled on the northern end. Rosenker also announced that the FBI had completed mapping the debris field, which will allow the state transportation department to begin removing cars from the fallen bridge's deck, as well as the deck itself. Under police escort, families of the missing were bused Saturday from a Red Cross center to the disaster site. When the doors opened, about 40 people streamed out and went straight to the edge, a few with arms wrapped around each other's shoulders. Most appeared silent, while a few pointed at the collapsed bridge. After no more than 10 minutes, they reboarded the buses, some hugging as they left to return to the temporary Red Cross center. The Associated Press earlier identified five of the missing, who all appeared on the police list: Christine Sacorafas, 45, a recent transplant to Minnesota who was on her way to teach a Greek folk dancing class; Greg Jolstad, 45, a construction worker who was operating a skid loader on the bridge; Peter Hausmann, 47, a former missionary heading to pick up a friend; and Somali immigrant Sadiya Sahal, 23, a pregnant nursing student traveling with her 2-year-old daughter, Hanah. The police list also included Vera Peck and her 21-year-old son, Richard Chit, who were in the same car, and Scott Sathers. Of the roughly 100 injured, 24 remained hospitalized Saturday, five in critical condition. President George W. Bush took an aerial tour of the damage Saturday morning, then went to the scene to speak with a construction worker who helped rescue children. After walking around the site, Bush went to a makeshift command post where he spoke with the families of two victims, as well as first responders and rescue workers. Bush praised the divers and all those who rushed to help victims of Wednesday's collapse of the Interstate 35W bridge, a major Twin Cities artery. The president also pledged to help expedite the bridge's reconstruction. The eight-lane bridge, which came tumbling within seconds during evening rush hour, once carried 141,000 vehicles a day. State transportation officials set an ambitious timetable for rebuilding the bridge, announcing Saturday they hoped to award a contract in September and have the project completed by the end of 2008 - about 15 months. The U.S. House late Saturday approved $250 million in funds to help repair the bridge; the Senate had approved the amount Friday. Congress still would have to appropriate the money in future legislation. A memorial service with songs and prayers for the victims was set for 7 p.m. Sunday. The bridge was deemed "structurally deficient" by the federal government as far back as 1990, and inspections over the years had raised alarm, with findings of rust-eaten steel beams, missing bolts and cracks in the welding that held load-bearing parts together. After the collapse, federal officials ordered states to immediately inspect bridges of similar designs. Transportation Secretary Mary Peters said Saturday that those inspections had not found any immediate problems.