WASHINGTON - House Minority leader Nancy Pelosi says Democrats remain divided over whether to participate in a new investigation into the deadly attack on the U.S. diplomatic mission in Benghazi, Libya.

Pelosi told reporters Friday the select committee Republicans have set up is a "political stunt," but she says she's still negotiating with Speaker John Boehner on the parameters of the probe and Democratic involvement.

The GOP-led House voted Thursday to establish the committee. It would be the eighth investigation into the Sept. 11, 2012 assault that killed four Americans, including U.S. Ambassador Chris Stevens.