COLORADO SPRINGS, Colo. (AP) — An attacker opened fire in a gay nightclub, killing five people and wounding 18, officials said Sunday. The club said the suspect was subdued by patrons.

Authorities received a report of a shooting at Club Q at 11:57 p.m. Saturday and responded within minutes, said Lt. Pamela Castro of the Colorado Springs Police Department.

The violence is the sixth mass killing this month and comes in a year when the nation was shaken by the deaths of 21 in a school shooting in Uvalde, Texas.

Castro had few details beyond the number of dead and wounded. She said the suspect was injured but didn’t know how and that the FBI was on the scene.

Attorney General Merrick Garland has been briefed on the shooting, Justice Department spokesman Anthony Coley said. The FBI said it was providing assistance to Colorado Springs police, but said the police department was leading the investigation.

The police department planned a news conference for 8 a.m. (10 a.m. EST) on the investigation.

The latest incident occurred as anti-gay rhetoric has intensified by extremists. In a statement, Club Q termed the shooting a hate attack.

“Club Q is devastated by the senseless attack on our community,” the club posted on its Facebook page. It said its prayers were with victims and families, adding: “We thank the quick reactions of heroic customers that subdued the gunman and ended this hate attack.”

Club Q is a gay and lesbian nightclub that features a “Drag Diva Drag Show” on Saturdays, according to its website.

In addition to the drag show, Club Q’s Facebook page said planned entertainment included a “punk and alternative show” preceding a birthday dance party, with a Sunday “all ages brunch.”

Colorado Springs is a city of about 480,000 located about 70 miles (112 kilometers) south of Denver that is home to the U.S. Air Force Academy, as well as Focus on the Family, a prominent evangelical Christian ministry.

In November 2015, three people were killed and eight wounded at a Planned Parenthood clinic in the city when authorities say a man opened fire because he wanted to wage “war” on the clinic because it performed abortions.

The motive behind Saturday’s shooting was not immediately known but it brought back memories of the 2016 massacre at the Pulse gay nightclub in Orlando, Florida, that killed 49 people. And it occurred in a state that has experienced several notorious mass killings, including at Columbine High School in 1999, a movie theater in suburban Denver in 2012 and at a Boulder supermarket last year.

Democratic Rep. Adam Schiff of California said on Twitter he was “sickened and horrified” by the shooting, adding: “The LGBTQ+ community is once again the target of the most terrible violence. And devastating attacks like these will only become more common if we don’t fight back. It must stop.”

Rep.-elect Eric Sorensen, who is Illinois’ first openly gay congressman, tweeted that “we must use loud voices to stand up against hate. Our country must turn down the hateful rhetoric aimed at our LGBTQ community.”

In June, 31 members of the neo-Nazi group Patriot Front were arrested in Coeur d’Alene, Idaho, and charged with conspiracy to riot at a Pride event. Experts warned that extremist groups could see anti-gay rhetoric as a call to action.

The previous month, a fundamentalist Idaho pastor told his small Boise congregation that gay, lesbian and transgender people should be executed by the government, which lined up with similar sermons from a Texas fundamentalist pastor.

There have been 523 mass killings since 2006 resulting in 2,727 deaths as of Nov. 19, according to The Associated Press/USA Today database on mass killings in the U.S.