Kentucky is one of 26 U.S. states that allow for permitless carry of firearms for eligible adults.

The Bluegrass State passed a law in 2019 removing the provisions that mandated state gun owners pass a background check if they were going to going to conceal carry their weapon. Under the law, most adults over the age of 21 can purchase and carry a firearm and take them to most places in Kentucky without any license.

Although gun owners can still apply for a gun license, which requires background checks, they are only meant for people who need such permits when traveling out of state.

Aside from federal laws that prohibit gun purchases by people with convicted felonies, there are no Kentucky laws that prohibit gun purchases to state residents who have mental health disorders, violent misdemeanor convictions, domestic abuse-related restraining orders or anyone with substance abuse disorders.

Firearms are still prohibited in several locations in Kentucky. Schools, government buildings, courthouses, police stations and any place that serves alcohol are gun-free locations, according to state law.

Kentucky law does not have any provisions preventing firearms in several locations such as hospitals, houses of worship, sports arenas, casinos, polling places and banks. However, local business owners and public and private colleges are also allowed to prohibit firearms on their properties, but they must have adequate signage on their premises, according to state law.

-ABC News' Ivan Pereira

"There are no words to adequately describe the sadness and devastation that our Old National family is experiencing as we grieve the tragic loss of our team members and pray for the recovery of all those who were injured," Old National Bank CEO Jim Ryan said in a new statement Monday night.

Ryan and other members of the Old National leadership team have been in Louisville much of the day offering support to affected individuals and their families, and they will continue to be on hand to provide support in the days ahead.

"Obviously, this is an incredibly difficult situation, and our entire focus is on making sure that everyone affected has the support and assistance they need," Ryan said. "On behalf of everyone at Old National, I also want to acknowledge and thank Louisville law enforcement, the medical community and state and local officials for their incredible response to this tragedy. And finally, we ask you to please continue to pray for all those affected."

-ABC News' Vera Drymon

A fifth person has died following Monday's mass shooting at a Louisville bank, police said.

Louisville police identified 57-year-old Deana Eckert as the latest victim.

Louisville Mayor Craig Greenberg spoke with ABC News' Trevor Ault and pledged to make reducing gun violence his top priority in office, hours after four people, including his own friend, were gunned down inside a downtown bank.

"We have to take action. Today is a day for love and support to the victims… but this is life and death, so as mayor, this will continue to be our number one priority," Greenberg – who was a victim of a workplace attack last year, said in the interview that took place a block away the bank.

Greenberg called his emotions "raw."

“The second I got the alert that there was an active shooter going on, of course my mind immediately went back to the workplace shooting that I survived just over a year ago," he said. "I know many people who work in that building, so I was thinking about them and everyone that was there."

-ABC News' Will McDuffie