Barker and Goldstein had performed together under the name TRVSDJ-AM at a free concert in Columbia on Friday night. Event sponsor T-Mobile said their hourlong set ended at about 7:15 p.m.

In this Sept. 7, 2008 file photo, DJ AM, left, and musician Travis Barker pose backstage at the 2008 MTV Video Music Awards held at Paramount Pictures Studio Lot in Los Angeles. A hospital spokeswoman in Columbia, S.C. says Barker and DJ AM have been critically injured in a Learjet crash on Friday. Federal officials say two crew members and two passengers have been killed. [Agencies]

The show, which included performances by former Jane's Addiction singer Perry Farrell and singer Gavin DeGraw, drew 10,000 people into the streets of Five Points, the neighborhood near the University of South Carolina, Coble said.

A longtime friend of Bland, the co-pilot, said he flew anti-smuggling missions 20 years for the US Customs Service and also flew missions for the Santa Ana Police Department and US Border Patrol.

"He was such an experienced pilot, it had to be something beyond their control," said Tim Ferrill, a Huntington Beach, California, pilot. "He was an absolutely meticulous pilot, very thorough and not a risk-taker at all."

Bland was survived by his wife and teenage daughter, Ferrill said.

Barker, 32, was one of the more colorful members of the multiplatinum-selling punk rock band Blink-182, whose biggest album was 1999's CD "Enema of the State" and sold more than 5 million copies in the United States alone.

After Blink-182 disbanded in 2005, Barker went on to form the rock band (+44) _ pronounced "plus forty-four." He also starred in the MTV reality series "Meet the Barkers" with his then-wife, former Miss USA Shanna Moakler. The show documented the former couple's lavish wedding and private life. Their later split, reconciliation and subsequent breakup made them tabloid favorites.

Goldstein, 35, is a popular DJ for hire who at one time was engaged to Nicole Richie.

He has spun a mix of hip-hop and dance beats for the hottest nightclubs and had a string of dates set up for the next few weeks. He reached the peak of his celebrity perhaps during his highly publicized romance with Richie a few years ago.

DJ AM also dated singer/actress Mandy Moore, and while he became a gossip favorite for his romances, he drew respect from music aficionados for his DJ skills.

Barker and Goldstein performed as part of the house band at the MTV Video Music Awards earlier this month.