One student is dead, and at least one other student is injured after a student opened fire Monday morning at Butler High School in Matthews, North Carolina, CNN reports. “We are incredibly saddened that we had a loss of life on one of our campuses,” said Charlotte-Mecklenburg School District Superintendent Dr. Clayton Wilcox. “And what makes it doubly worse is it was one of our students who was the shooter.” According to Wilcox, the shooting happened in the main hallway of the school. Terrified texted parents from inside of the building. Matthews Police Department placed the school on lockdown, but it has now been lifted and the school is secure, according to authorities. There have been at least 23 school shootings so far in 2018, during which at least one student was shot, TIME reports. This is a developing story. Check back for updates.