A group of American victims of Hamas’s Oct. 7, 2023, terrorist attack is suing several Gaza-based terrorist groups who carried it out and the state actors who support them.

The Anti-Defamation League and Crowell & Moring filed the federal lawsuit on Thursday in the U.S. District Court for the District of Columbia on behalf of the more than 140 U.S. citizen victims and family members who are plaintiffs.