Three people, including the assailant, were critically injured in a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said, just days before a nationwide student-organised march against school violence.
The shooting occurred shortly after 8:00 am (1200 GMT) at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington.
“A single shooter fired a round at a female victim just at the beginning of the school hours this morning,” St. Mary's County Sheriff Tim Cameron told the MSNBC television network.
The sheriff said the shooter was “engaged” by the “school resource officer” responsible for security and was critically wounded.
He said a female student was in critical condition and a “young man” was in critical but stable condition. All three were taken to area hospitals for treatment.
Police cars and emergency vehicles with flashing lights could be seen surrounding the school.