According to CNN, there has been a shooting reported at Great Mills High School in Maryland.

School officials have reported that they are in lockdown, and police are at the scene. The school district's website reports that the incident has been contained.

Maryland FBI agents are on the scene at Great Mills High School and ATF agents from the Baltimore office are on the way. A tweet from Leonardtown High School reads:

We are aware of the situation at Great Mills High. GMHS parents. please report to our auditorium. Leonardtown High School students are safe.

Police are currently going through each classroom to clear the school at which point the students will be escorted out of the building. This is a developing story.

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