Families of American victims of the October 7 attacks led by Hamas have filed a lawsuit in a US federal court against Iran and other terror groups, presenting new evidence of Tehran's involvement. The suit includes secret documents showing Iran's Islamic Revolutionary Guard Corps funding Hamas and a document outlining a defense agreement between Hamas and Iran-backed groups. The suit also names Hezbollah, Islamic Jihad, and the Popular Front for the Liberation of Palestine. The families seek financial awards under the US Foreign Sovereign Immunities Act and Anti-Terrorism Act.