A vehicle ran a stop sign and hit a school bus carrying 18 Zephyrhills High School students this afternoon, though no one was hurt, school officials said. The accident happened at 2:10 p.m. at the intersection of 5th Avenue and 20th Street, said school district spokeswoman Summer Robertson. The vehicle hit the bus and then hit another car, she said. The students, who were uninjured, were put on another bus and taken to their stops. Parents have been notified. The bus sustained minimal damage. No information was available on the driver of the other vehicle.