Detectives on Thursday were investigating what prompted a fight between three students at a Northern California high school that ended in one fatally stabbing another as more than two dozen classmates watched. A 15-year-old freshman was booked on suspicion of homicide and other charges in connection with Wednesday's fatal stabbing in an art classroom at Montgomery High School in Santa Rosa, California. One 16-year-old junior was killed and another injured, police said. The attack shocked Santa Rosa — a community best known for its wineries about 50 miles (80.5 kilometers) north of San Francisco — and prompted lockdowns of several nearby schools as officers searched for the teenage suspect. The school will be closed for the rest of the week. Principal Adam Paulson, in a message to parents, students and the school community, called the stabbing “the darkest day anyone can remember at Montgomery High,” according to the Press-Democrat. Members of the New Vintage Church gathered Thursday morning to pray for the school community. Santa Rosa police have not released the name of the 15-year-old student, a freshman, because he is a juvenile. He was booked on felony charges of homicide, attempted homicide and having a weapon on a school campus. He was additionally booked on a misdemeanor charge of battery on a school campus. The teenager was taken into custody Wednesday hiding in a creek bed after he fled the classroom. It was not immediately clear whether he had an attorney who could speak on his behalf. The Sonoma County District Attorney's Office did not immediately have a comment Thursday about the potential filing of charges. “This is truly a sad day. The tragedy that happened here today is heartbreaking,” Anna Trunnell, the Santa Rosa City Schools superintendent, said at a news conference.