Mass shooting in Milwaukee: What we know

• The victims were identified by police on Thursday as 33-year-old Jesus Valle Jr., 61-year-old Gennady Levshetz, 33-year-old Trevor Wetselaar, 57-year-old Dana Walk, and 60-year-old Dale Hudson.
• Police said the shooting happened at about 2 p.m. local time at the campus, which has more than 20 buildings.
• "Six families are grieving and will be grieving because of this horrific act of this individual. ... There were five individuals who went to work today, just like everybody goes to work," Barrett told reporters.

What they're saying: President Trump told reporters, "We send our condolences. We'll be with them, and it’s a terrible thing, a terrible thing."

• Rep. Mike Gallagher (R-Wis.) tweeted, "The news out of Milwaukee is devastating, and my heart goes out to the victims, their families, and all those at Molson Coors. There’s no place for these kinds of hateful and disgusting acts in our society."
• "Gun violence has taken too many lives in Milwaukee and the mass shooting today is heartbreaking," Sen. Tammy Baldwin (D-Wis.) tweeted. "I want to thank the first responders who ran into harm's way and saved lives. My office is standing by to help the #MKE community in the wake of this tragedy."

Go deeper: The deadliest mass shootings in modern U.S. history

Editor's note: This article has been updated with new details throughout.