Updated

Several hundred people have gathered in a courthouse square to protest the fatal shooting of a 13-year-old boy by a California sheriff's deputy.

The protesters, many of them middle and high school students, assembled Tuesday in downtown Santa Rosa. They carried signs and wore hooded sweatshirts with photos of Andy Lopez.

Lopez was shot by a Sonoma County deputy last week after authorities say the deputy mistook a pellet gun Lopez was carrying for an assault rifle.

The shooting is being investigated by the FBI, police and prosecutors.

The Press Democrat of Santa Rosa says county offices are set to close early, as the protesters march from a square to a junior college and then to the Sheriff's Department.