Former The Voice contestant and YouTube star Christina Grimmie was critically shot at a concert Friday, June 10 by a 27-year-old man from St. Petersburg in Florida, police revealed Saturday.

Grimmie, who was only 22 years old, passed away at an Orlando hospital 5 hours later.

The suspect, whose name was Kevin James Loibl, shot Grimmie in a premeditated attack and then proceeded to commit suicide after Grimmie's brother tackled him, the Orlando Police Department said.

There was no sign that Grimmie knew the attacker and no motive was announced.

More Details About The Florida Incident

That night, Grimmie had just finished performing live with the band Before You Exit at Orlando's Plaza Live Theater.

She was signing autographs for fans shortly before 10:30 p.m. when the suspect walked up to her and opened fire.

Orlando Police Chief John Mina said Loibl had traveled to Orlando from St. Petersburg with two handguns, loaded magazines and a hunting knife.

"He came here to commit this crime and had plans to travel back to where he came from," said Mina.

Mina said Loibl was planning to leave Orlando by public transportation as the suspect did not bring any car, but when Grimmie's brother Marcus tackled Loibl, the gunman shot and killed himself.

Police spokesperson Wanda Miglio called Marcus a hero for stopping the suspect from hurting anyone else in the venue.

There were about 120 people in the theater at that time. Fans who were there said they thought the gunshots were a "prank."

Yesenia Camacho, a resident of Tampa, said the sound seemed fake.

"It's not the movie-type gunshots," said Camacho. "It's this banging or popping and three times in a row, echoed."

Sheina Almaguer, a resident of Kissimmee, watched Grimmie perform at the show and said she "sang her heart out."

Almaguer was standing near the tour buses when the tragic incident happened. She, too, thought it was a prank, but a few minutes later she saw people running out. One girl was even crying on the floor.

Investigations

In the meantime, police are investigating the suspect's phone to help establish a motive. Detectives were also sent to Loibl's home to search his computer for evidence.

On the door of Loibl's house, his relatives posted a note that expressed "deepest sorrow" to Grimmie's family, friends and fans, but said there would be no other comment.

Mina said the security guards at Plaza Live Theater search bags of concertgoers, but do not use metal detectors. The theater has canceled all activities until further notice.

Grimmie had built a huge fan base on her YouTube account. She appeared on the sixth season of The Voice and was mentored by Adam Levine. Fans will forever remember Grimmie's talent and her incredible positivity.

There are no words. We lost a beautiful soul with an amazing voice. Our hearts go out to the friends, fans and family of @TheRealGrimmie.

— The Voice (@NBCTheVoice) June 11, 2016