LAS VEGAS (AP) -- A Las Vegas hospital says another person has died from wounds suffered in the weekend shooting.
Sunrise Hospital and Medical Center said the victim died Tuesday afternoon. No details about the person were released and the hospital said it still has 31 people in critical condition.
The additional fatality kept the death toll at 59 after Clark County Coroner John Fudenberg revised his earlier count of victims downward by one.
The largest mass shooting in U.S. history was carried out late Sunday by Stephen Paddock, who opened fire on a concert crowd from the 32nd floor of the Mandalay Bay casino and hotel. He killed himself as police arrived outside his door.
Federal officials say the Las Vegas shooter had devices attached to 12 weapons that allow semiautomatic rifles to mimic fully automatic gunfire.
Bureau of Alcohol, Tobacco and Firearms Special Agent in Charge Jill Schneider also told reporters Tuesday that Stephen Paddock had nearly 50 guns in three locations.
She said he had a combination of rifles, shotguns and pistols.
The gun attachment that mimics automatic gunfire is a little-known device called a "bump stock" that was not widely sold. The stocks have been around for less than a decade, and Schneider said officials determined they were legal.
Union officials say 12 off-duty firefighters were shot while attending a country music festival in Las Vegas, including two who were wounded while administering CPR to gunshot victims.
Angelo Aragon, president of the Professional Fire Fighters of Nevada, said Tuesday that all the firefighters survived their wounds.
Aragon said dozens of area firefighters were attending the event and about 150 from about 20 stations responded to help after the massacre.
Several off-duty firefighters described sending loved ones away from the scene as they set up triage stations and taught concertgoers to help provide emergency care such using belts as tourniquets.
Anthony Robone of the Henderson fire department said he did first aid on his older brother Nicholas who was shot in the upper chest. The brother is in stable condition.
Authorities say the gunman in the Las Vegas shooting set up cameras inside and outside the hotel room where he opened fire on the crowd at a country music concert.
Sheriff Joe Lombardo said at a news conference Tuesday that he believes shooter Stephen Craig Paddock set up the cameras to see if anyone was coming to take him into custody. He did not release further details.
The sheriff also said authorities had completed their investigation at the gunman's property in Reno, finding five handguns, two shotguns and a plethora of ammunition.
Authorities say Paddock killed 59 people and injured more than 500 others when he opened fire Sunday night on an outdoor country music concert from a 32nd floor hotel tower.
Hospital officials say 50 people remain in critical condition after being wounded.
Police said Monday that the shooter, the 64-year-old Paddock was found dead in a hotel room with as many as 23 firearms and thousands of rounds of ammunition.
Assistant Clark County Sheriff Todd Fasulo said officers also found 19 firearms at his home in Mesquite, Nevada.
Fasulo stresses that investigators believe Paddock was the sole shooter.
Authorities said one of the people killed was an off-duty Las Vegas police officer. His name was not immediately released.
Sheriff Lombardo said Paddock first checked into the Mandalay Bay casino-hotel on Sept. 28 and was found dead inside a hotel room.
Two on-duty officers were also hurt. One of those has been upgraded from critical to stable condition.
Around 10 p.m. PDT, concert-goers reported seeing muzzle flashes from the upper floors of the Mandalay Bay hotel-casino across Las Vegas Boulevard from the Route 91 Harvest country music festival and the sound of what they described as automatic gun fire.
Country music star Jason Aldean was in the middle of his performance when the bullets rained down on the crowd. He posted on Instagram hours later, calling the shooting "beyond horrific."
The Clark County Sheriff says they believe this was a "lone wolf" attack, but were looking for a person of interest. Police now say they don't believe 62-year-old Marilou Danley was involved in the Sunday night shooting. Police initially said they were seeking the woman who may have been the roommate of the shooter.
Some flights destined for the McCarran International Airport were diverted due to incident. The airport says to check with airline to see if all flights are on schedule.
President Donald Trump is extending condolences to the victims of the shooting in Las Vegas and their families.
In a tweet Monday, Trump offered "My warmest condolences and sympathies to the victims and families of the terrible Las Vegas shooting. God bless you!"
White House spokeswoman Sarah Huckabee Sanders said Trump was "briefed on the horrific tragedy in Las Vegas." Sanders said that "we are monitoring the situation closely."
A brother of Las Vegas shooter Stephen Craig Paddock said he was a multimillionaire who made much of his money investing in real estate.
Eric Paddock told reporters Monday in Orlando that his brother was also an accountant for many years.
He was not aware of his brother having any recent financial difficulties.
Stephen Craig Paddock recently sent a walker by mail to his 90-year-old mother.
The brother said Stephen collected coins when he was a child.
Police have said the suspect killed at least 59 people in the worst mass shooting in recent U.S. history.