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A shooter opened fire Wednesday morning during Mass at a Minneapolis Catholic school , killing two children and injuring 17 other people before dying by suicide, officials said.

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The shooting happened at Annunciation Catholic School, just days after the first day of school there on Monday.

Of the 17 injured, police said 14 were children, with their ages ranging from 6 to 15. Authorities said they are all expected to survive.

The shooting comes as school years are starting across the U.S., and some universities have dealt with false alarms about school shootings. At least a dozen college campuses faced hoax active shooter calls — some featuring gunshots sounding in the background.

Here are some of the

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