One person was killed and up to 40 others were injured in an accident involving a tractor-trailer truck and a tour bus Thursday, according to Gilmer County's fire chief. The accident happened at the intersection of Whitestone Road at Highway 515 around 11:15 a.m. All northbound lanes of Highway 515 were closed as an "extensive triage effort" was underway, according to Gilmer County Fire Chief Tony Pritchett. A witness who drive by the accident told 11Alive it appeared the bus was "full of elderly people". Skytracker footage showed that the bus was from Greatime Getaways in Marietta, Ga. According to the bus company's website, they offer a "safe, fun, and affordable way to enjoy exciting casino action from the northwest Atlanta area." According to the Pickens Progress, all passengers had been removed from the bus by 12:30 p.m., and ambulances were making return trips to accommodate the injured.