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

Minneapolis Police Chief Brian O’Hara said all of the victims are expected to survive, though they have a range of injuries.

O’Hara identified the shooter as 23-year-old Robin Westman, adding that Westman had no prior criminal history and law enforcement believes he acted alone.

“There’s no words that’s going to ease the pain of the families today,” Minnesota Governor Tim Walz said at a news conference Wednesday afternoon.

Walz called the church a place founded on community, service and family.

“What happened here today will not be gone. Minnesotans will not step away. We’re standing with this community,” Walz said during the news conference.

He added that violence is all too common across the country and “it’s Minnesota’s day today.”

“It’s my strongest desire that no state, no community, no school ever experiences a day like this,” he said.

AP video by Mark Vancleave; Produced by Luke Garratt