A 30-year-old man was transported by ambulance Friday night from Country Jam to St. Mary's Medical Center after a self-inflicted shooting that is being investigated by law enforcement.

The shooting was an isolated incident, according to Mesa County Sheriff's Office spokeswoman Megan Terlecky.

"We believe it was accidental, but we're still investigating," she said, noting that they are looking into how the gun came to be at the festival.

Law enforcement officers stationed at the festival responded immediately to the incident, which happened at 5:42 p.m. in the main campground on the east side of the Country Jam Ranch in Mack.

Firearms and weapons of any kind are not allowed on the festival grounds. This year's security is ramped up from previous festivals, including searches of small bags and prohibition of backpacks or other large bags. Terlecky said there is an increased law enforcement presence as well, including local, state and federal partners, and security enhancements have been made in consideration of the mass shooting that happened at the Route 91 Harvest music festival in Las Vegas last year.

She said some of the increased security is obvious to festival goers, but other precautions are discreet.

"Some of it you'll see, some of it you won't see," she said, noting that includes non-uniformed law enforcement on scene.

On the first day of Country Jam, 24 arrests were made for alcohol-related offenses, all tickets for minors in possession of alcohol.