US House of Representatives Democrats are considering whether to participate in a Republican-led investigation into the deadly attack on the US consulate in Benghazi, Libya, in 2012.

Democrats may boycott the panel, send just one member or the allotted five.

Republicans have argued the Democratic Obama administration misled the public on the nature of the attack.

House Minority Leader Nancy Pelosi called the panel a “political stunt”.

Four Americans including US Ambassador Chris Stevens were killed.