The stabbing of a 16-year-old student outside a Maryland high school Tuesday was related to MS-13 and several other students are in custody in connection with the case, according to prosecutors.

Prince George’s County State’s Attorney Angela Alsobrooks would not detail what evidence pointed to MS-13 involvement in the incident at Parkdale High School in Riverdale but said the information investigators have gathered points to the violent street gang.

“To take weapons and to do violence at a school, that will not be tolerated,” Alsobrooks said. “The first action for us is to aggressively prosecute the individuals disrupting the peace at these schools.”

The juveniles in custody are Parkdale students, prosecutors said.

Prince George’s County officers were called to Parkdale High School shortly after 1 p.m. Tuesday about a group gathering outside the school along a wood line, Police Chief Hank Stawinski has said. While police were responding, a dispute broke out among members of the group and the 16-year-old student was injured. Officers who arrived saw the student staggering out of the woods and rendered aid before he was taken to a hospital, police said.

Alsobrooks addressed the stabbing at Parkdale on Wednesday as more details emerged in the unrelated shooting of a 17-year-old outside Oxon Hill High School earlier this week. Prince George’s County police have had to respond to violence near or at a county high school twice in two days this week, sparking concern in the community.

On Monday, an 11th-grade student was lured to the parking lot of Oxon Hill High School by his ex-girlfriend when two other students in the back seat of a vehicle grabbed him in an attempted robbery, according to police charging documents made public Wednesday.

“Give that s--- up,” one of the teens in the back seat demanded before the victim was shot during a struggle, charging documents state.

The wounded student ran into the school cafeteria, where he was able to contact police.

Police have charged two teens as adults with attempted murder in the Oxon Hill case: Zanaya Bryant, 17, identified in charging documents as the victim’s ex-girlfriend, and Anthony Hollingsworth, 18.

Hollingsworth, who is romantically involved with Bryant, denied that he was involved in the incident, charging documents state.

Police are still searching for a third Oxon Hill student suspected in the shooting, Alsobrooks said. The teen shot outside Oxon Hill was released from the hospital shortly after the shooting.

The teen stabbed near Parkdale remains hospitalized in stable condition, police said.