BULVERDE, Texas (AP) — A student shot a teacher at a Texas high school and then fatally shot himself, authorities said Monday.

The shooting happened at Hill Country College Preparatory High School in Bulverde, the Comal County Sheriff’s Office said in a social media post. No other injuries were reported. Authorities have not said what may have led to the shooting.

The teacher was taken to a San Antonio hospital, but the sheriff’s office did not have an update on her condition. The 15-year-old male student died on the scene, the sheriff’s office said.

A spokesperson for the sheriff’s office told The Associated Press that the student died from a self-inflicted gunshot.

The school was placed on lockdown, and students were bused to a nearby middle school, where parents stood in long lines, some praying, as they waited to be reunited.