Las autoridades estadounidenses están investigando un posible tiroteo en un instituto en Maryland, Estados Unidos. El jefe de la Policía de St Mary ha confirmado un incidente en Great Mills High School.
There has been an incident at Great Mills High School. Parents please DO NOT respond to the school. Report to Leonardtown High School
— St. Mary's County Sheriff's Office (@firstsheriff) March 20, 2018
(Noticia en desarrollo)