Elementary school documentary on movie channel cant think of what it was called?

there was a documentary on one of the movie channels a couple years
back about an elementary school being taken over it was subtitled i
think this might have taken place in south america but the people
taking over the school had guns and i believe bombed the school as
well the documentary interviewed the kids that were involved and i
don't remember much besides that i hope to see it again with your help
thanks all