Former "The Voice" contestant Christina Grimmie died after being shot as she signed autographs following a concert in Orlando, Florida, on Friday night, police said. The attacker then fatally shot himself.

The 22-year-old was meeting with fans after opening for the band Before You Exit at The Plaza Live when the shooting occurred at 10:24 p.m. ET, according to Orlando police. The concert had ended at 10 p.m.

The attacker, who was carrying two guns, walked toward Grimmie and shot her, and then was tackled by Grimmie's brother, according to police.

"Christina's brother immediately tackled the suspect stopping him from causing any more harm to Christina and her fans. During the struggle, the suspect shot himself," the Orlando Police Department said in a statement.

There were around 60 people in the area at the time, but nobody else was hurt, Orlando police spokeswoman Wanda Miglio said at a news conference.

"This should have been something that was fun and exciting, and of course when something like this happens it's just a tragedy," she added, calling Grimmie's brother a "hero."

Orlando police, who did not identify the shooter and said a motive is not yet known, said they would provide an update on the investigation at 11 a.m. ET.

With deep regret, we have confirmed Christina Grimmie, [MENTION=69904]The[/MENTION]RealGrimmie has died from her injuries.
— Orlando Police (@OrlandoPolice) June 11, 2016

Josh Call, who was working at a vegan hot dog stand outside the venue, told the Orlando Sentinel he heard four or five shots.

"It was quick like pow, pow, pow," he told the paper. After a few minutes, he said he went inside and saw a man and a woman on the floor bleeding heavily.

"It was horrifying," he told the Sentinel.

Grimmie, a native of Marlton, New Jersey, came in third place on Season 6 of "The Voice," NBC's singing competition, which aired in 2014. She was just 19 when she auditioned with Miley Cyrus' "Wrecking Ball" and chose Maroon 5 lead singer Adam Levine as her coach.

Levine posted a photo of himself with Grimmie on Instagram, commenting before her death was confirmed: "I'm sad, shocked and confused. We love you so much Grimmie. We are all praying hard that you can pull through this ... this just isn't fair."

Before You Exit called the singer "such a loving, caring, beautiful person with the biggest heart" in a statement posted to Twitter hours after her death was announced.

"She was an absolutely incredible musician and an even better friend," it added. "We are so so saddened by her passing and are completely heartbroken."

Today we lost an angel, sister, and a beloved friend. #RipChristina pic.twitter.com/EkwTKsaLFr
— Before You Exit⇞ (@beforeyouexit) June 11, 2016

NBC's Carson Daly, host of "The Voice," told TODAY that Grimmie was "such an incredible talent and incredible person."

"She really was special," he said. "She had an infectious laugh, she was determined, she was confident, but she was so incredibly sweet. You would never forget meeting her."

Other fellow artists and fans also wrote tributes to Grimmie, who was discovered on YouTube and had more than 3 million followers on her account zeldaxlove64. When reports of Grimmie's death first surfaced, #PrayforChristina was the top trending hashtag on Twitter.

Grimmie's publicist Heather Weiss confirmed her death early Saturday morning.

"It is with a heavy heart that we can confirm that Christina has passed and went home to be with the Lord," Weiss said in a statement. "We ask at this time that you respect the privacy of her family and friends in their time of mourning."

After her death was confirmed, #RIPChristina became the top trending hashtag as Grimmie's fans took to social media to express an outpouring of grief.

There are no words. We lost a beautiful soul with an amazing voice. Our hearts go out to the friends, fans and family of [MENTION=69904]The[/MENTION]RealGrimmie.
— The Voice (@NBCTheVoice) 11 June 2016

I am so heartbroken. [MENTION=69904]The[/MENTION]RealGrimmie you are so loved and already missed. See you again️#RIPChristina
— ZEALYN (@zealyn) June 11, 2016

Tonight we lost a singer, friend, daughter, sister, etc in the beautiful Christina Grimmie. Praying for all those who are hurting tonight
— MKTO Updates (@MktoTourUpdates) June 11, 2016

Christina Grimmie was such a kind, generous person, and so talented. What a light has been taken from the world.
— John Green (@johngreen) June 11, 2016

The Philadelphia Inquirer reported in 2014 that Grimmie moved to Los Angeles two years earlier after joining Selena Gomez on tour.

"I'm done being surprised by cool things she does. She's very talented and she's worked incredibly hard — it's a dangerous combination," her brother, Mark Grimmie, told the newspaper at the time.