Maryland teen charged as adult for alleged stabbing in high school bathroom

The injured student was airlifted from the school's baseball field to a nearby hospital shortly before 1 p.m. He was released Wednesday afternoon.

"I heard what was going on. We saw the helicopter land because we live right there and we watched it go around in a circle and I came outside, and they told me what happened - somebody got stabbed, and they had the stabber in custody, and he wasn't running around causing a threat, and I was glad, too," neighbor Edward Harris told Fox 5.

Students were held in their classrooms while a school resource officer secured the building. Officials credited the on-site school resource officer (SRO), school nursing staff and responding medical personnel for their swift response.

"There was very swift action by our SRO, who was on scene, able to get there as quickly and as safely as possible," St. Mary's County Sheriff's Office Detective Helen Deitrich said.

"He was able to disseminate information in real time, because he is within that school, the help from our medical professionals who arrived on scene and quickly assessed the victim, as well as the nursing staff at the school, they did a phenomenal job."

The sheriff's office said the investigation remains ongoing, and it is not yet clear what led to the altercation.