Official: Jenni Rivera's plane took 28,000-foot plunge MEXICO CITY Mexico's top transportation official says a plane carrying Mexican-American music superstar Jenni Rivera plunged almost vertically from more than 28,000 feet and hit the ground in a nose-dive at more than 600 miles an hour. Gerardo Ruiz Esparza, Mexico's secretary of communications and transportation, offered the first detailed accounts of the moments leading up to the crash that killed Rivera and six other people aboard the Learjet on Sunday in northern Mexico. Ruiz told Radio Formula that the plane hit the ground 1.2 miles from where it began falling, meaning it plummeted at a nearly 45 degree angle. He says: "The plane practically nose-dived. The impact must have been terrible. Mexican authorities were performing DNA tests Tuesday on remains believed to belong to Rivera and the others on board. Jenni Rivera: New details of plane crash revealed Fans hold vigil for Jenni Rivera Investigators said it would take days to piece together the wreckage of the plane carrying Rivera and find out why it went down. Authorities, meanwhile, began looking into the history of the plane's owner, Starwood Management of Las Vegas. Another of its planes was seized in September by the U.S. Drug Enforcement Administration in McAllen, Texas. The U.S. National Transportation Safety Board said it was sending a team to help investigate the crash of the Learjet 25, which disintegrated on impact Sunday with seven people aboard in rugged terrain in Nuevo Leon state in northern Mexico. Human remains found in the wreckage were moved to a hospital in Monterrey, the closest major city to the crash, and Rivera's brother Lupillo was driven past a crowd of reporters to the area where the remains were being kept. He did not speak to the press. A state official, speaking on condition of anonymity because of the ongoing investigation, said investigators were testing DNA from the remains in order to provide families with definitive confirmation of the deaths of their loved ones. Alejandro Argudin, of Mexico's civil aviation agency, said it would take at least 10 days to have a preliminary report on what happened to the plane. "We're in the process of picking up the fragments and we have to find all the parts," Argudin told reporters on Monday. Depending on weather conditions it would take us at least 10 days to have a first report and many more days to have a report by experts. In an interview on Radio Formula, Argudin said Mexican investigators weren't sure yet if the Learjet had been equipped with flight data recorders. He also said there had been no emergency call from the plane before the crash.