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 and assisting.

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 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 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.