Active shooter incidents in the U.S. dipped slightly in 2023 and took place in 26 of the 50 states, according to an FBI report released Monday.

The 48 shootings totaled two fewer than in 2022 but still represented a 60% increase over the 30 in 2019, the FBI said.

The 40-page report listed 244 casualties, with 105 people killed and 139 wounded, including two and 12 law enforcement officers, respectively.

The shooters used a total of 60 firearms that comprised 43 handguns, 16 rifles and one shotgun.

California had the most active shooter incidents, with eight, followed by Texas and Washington, with four each.

There were also multiple incidents in Georgia and Pennsylvania, where there were three each, and there were two each in Arizona, Florida, Nevada, Ohio and Tennessee.

The bloodiest took place in Maine, where 18 people were killed and 13 were wounded during shooting sprees by a single gunman at a bar and a bowling alley in Lewiston on Oct. 25.

Three incidents didn't result in any casualties.

The FBI defines active shooter incidents as involving one or more people "actively engaged in killing or attempting to kill people in a populated area."

That excludes categories including gang violence, drug-related violence, residential or domestic disputes, barricade or hostage situations and shootings tied to another criminal act.

In comparison, the nonprofit Gun Violence Archive counts any shooting in which at least four people were killed and/or wounded.

It tallied 655 mass shootings in 2023 and 249 so far this year, according to data posted on its website.

The FBI report said 50% of the active shooter incidents in 2023 occurred in open spaces accessible to the public, such as roadways, neighborhoods and commercial areas.

Of 49 shooters, 48 were male and one identified as both female and transgender male, and their ages ranged from 17 to 72, the FBI said.

Thirty were arrested, 12 were killed by law enforcement and seven died by suicide.