Maryland School: 3 Critically Injured Including Shooter

NBC News reports:

A student pulled a gun out and shot two other students at a high school in southeast Maryland Tuesday morning before the shooter was wounded, the St. Mary’s County sheriff said.

The gunman entered Great Mills High School in Great Mills, Maryland, at the beginning of the school day and shot a female student in a hallway, Sheriff Tim Cameron said live on News4. A male student also was hit by a bullet.

Information was not available immediately on the relationship between the students, Cameron said. The shooter exchanged fire with a school resource officer, trained, armed deputy sheriff, Cameron said. The shooter was wounded; the officer was not. All three students are in critical condition.

UPDATE: Local authorities report the shooter has died.

Parkland students are responding.