A man who reportedly shot and killed four people and injured more in a mass shooting at a Louisville, Kentucky, bank was a graduate of the University of Alabama.

Connor James Sturgeon, 25, allegedly killed four people and injured nine more Monday morning at the Old National Bank in Louisville.

Sturgeon reportedly was either an employee at the bank or had been one recently.

Although his family lived in Greenville, Indiana, Sturgeon earned his master’s degree in finance from the University of Alabama.

Police in Louisville arrived as gunshots were still being fired inside Old National Bank and exchanged fire with the shooter, who died, Louisville Metro Police Department Deputy Chief Paul Humphrey said at a news conference. He said it wasn’t clear whether the shooter killed himself or was shot by officers.

“We believe this is a lone gunman involved in this that did have a connection to the bank. We’re trying to establish what that connection was to the business, but it appears he was a previous employee,” Humphrey said.

Police Chief Jacquelyn Gwinn-Villaroel identified the shooter as Connor Sturgeon,.

Nine people, including two police officers, were treated for injuries from the shooting, University of Louisville Hospital spokeswoman Heather Fountaine said in an email. One of the officers was in critical condition, she said. At least three patients had been discharged.

An emotional Kentucky Gov. Andy Beshear said he lost a friend in the shooting in the building on East Main Street not far from the minor league ballpark Louisville Slugger Field and Waterfront Park.

“This is awful,” he said. “I have a very close friend who didn’t make it today. … And one who’s at the hospital that I hope is going to make it through.”

The Associated Press contributed to this article.