An armed man held up two teachers Friday morning at a Detroit elementary school.
It happened before students arrived at Marquette Elementary School for report card day, which marked the end of the school year.
Police say the man entered a classroom about 8 a.m. and put a gun to the teacher's head.
They say he took her purse and rings, then robbed a second teacher before fleeing.
Police say the robber seemed to be familiar with the school.
Investigators were reviewing surveillance videos in search of evidence.
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