The Oakland Raiders have filed paperwork to move to Las Vegas.

The NFL and officials in Nevada confirmed on Thursday that the Raiders are asking league owners to approve the move, although the team made no immediate comment and a group that wants to keep the team in Oakland vowed it was still in the game and "playing to win".

Clark County commission chairman Steve Sisolak made the filing of paperwork public on Twitter, and told Associated Press he had spoken with team officials.

"I am happy to see the process moving forward, and greatly appreciate the Raiders' commitment and work of the Adelson family to the hope of making Las Vegas the home of the Raiders," Sisolak said.

Sisolak chairs an elected panel with oversight of the Las Vegas Strip and was part of an 11-member panel appointed by Nevada governor Brian Sandoval to study proposals backed by billionaire casino owner Sheldon Adelson's company, Las Vegas Sands Corporation, to build a domed stadium to lure the Raiders to town.

Andy Abboud, the Sands executive working on the project, called the filing "one of those moments that makes it real" and vowed necessary negotiations will be completed.

"The people of Las Vegas should be excited that the NFL is coming to town," Abboud told AP. "Business deals take time to work out, but everything will work out in the end."

Sandoval also confirmed the filing, crediting Raiders owner Mark Davis with fulfilling a promise to seek the move.

"Mark Davis is a man of his word and the filing of the Raiders' application for relocation of the franchise with the NFL is a significant step in bringing the team to Las Vegas," Sandoval said.

A site hasn't been picked for the proposed $1.9 billion, 65,000-seat stadium. It is expected to be close to the Las Vegas Strip and tens of thousands of hotel rooms.

Sandoval and Nevada lawmakers have committed $750 million in hotel tax revenue toward the project, Adelson's company has promised $650 million, and Davis and the Raiders pledged $500 million from the team and the NFL.

Any relocation to Las Vegas must be approved by three-quarters of NFL team owners.

The league said the Raiders' application would be reviewed in the coming weeks by its staff and stadium and finance committees "as is provided for under the NFL policy and procedures for proposed franchise relocations".

A statement from an investment group seeking approval for a new $1.3 billion, 55,000-seat stadium in Oakland said the filing wasn't a surprise.

The investors are anchored by 57-year-old Hall of Famer Ronnie Lott and 50-year-old former Raiders quarterback Rodney Peete.