Emergency crews responded to a shooting at Annunciation Catholic School in Minneapolis on Wednesday morning.Here's what we know and don't know about the shooting:What we know:At least five children were injured in the shooting, authorities and a hospital said.The shooter has been "contained" and there is no longer any "active threat" to the community, the Minneapolis city government said.The Annunciation Catholic School serves children from pre-kindergarten through eighth grade.Multiple agencies have responded to the scene, including the FBI.What we don't know: The shooter has not yet been identified and their possible connection to the school is unknown.The names and ages of the victims are not yet known.