This is the man who killed Jersey singer Christina Grimmie

ORLANDO, Fla. — A gunman who shot and killed a New Jersey singer who rose to fame after appearing on "The Voice" traveled to Orlando from another Florida city specifically to attack her and then fatally shot himself, authorities said Saturday.

Orlando Police Chief John Mina said at a news conference that the suspect, identified as 27-year-old Kevin Loibl of St. Petersburg, Florida, didn't appear to know Christina Grimmie personally. Grimmie was shot to death after giving a concert in Orlando on Friday night. She died early Saturday.

"She was doing a meet-and-greet, just signing autographs and selling merchandise. This white male approached her and opened fire, striking her," Mina said. "We believe he came here to commit this crime."

Loibl had on him two handguns, two loaded magazines and a hunting knife, Mina said.

Grimmie's brother, Marcus, immediately tackled the gunman, who then shot and killed himself during the struggle, police said. They credited the singer's brother with preventing the gunman from hurting others. Around 120 others were in The Plaza Live at the time.

"Very heroic actions by Marcus Grimmie to jump in and it definitely could have prevented further loss of life," Mina said.

Detectives were searching Loibl's cellphone and social media accounts looking for clues as to a motive, Mina said, but they weren't aware of any history of stalking of Grimmie by the suspect.

At Loibl's home, in St. Petersburg, someone had left a note on the front door, expressing the "deepest sorrow" for the loss "to the family, friends & fans of the very talented, loving Christina Grimmie." The note said there would be no other comment. No one answered the door to the one-story house that had a rusted, metal animal trap in the yard.