A gunman took the life of at least two students and injured 17 other people in an attack Wednesday on a morning Mass at a Catholic school in southern Minneapolis, according to police.

The shooter, who had barricaded the church door, then killed himself. The 20-year-old suspect was dressed in black and carrying a rifle, pistol and shotgun, officials said.

The children killed in the attack were 8 and 10 years old. At least four children remain in critical condition, according to the chief of emergency medicine at one of the three hospitals treating victims.

“Don't just say this is about thoughts and prayers right now, these kids were literally praying,” Minneapolis Mayor Jacob Frey said during an afternoon press conference. “It was the first week of school. They were in a church.”

Here’s what we know about the incident:

Some children remain in critical condition

The........

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