NEW YORK — Victims of Hamas’ Oct. 7 attack on Israel sued Iran, Syria and North Korea on Monday, saying their governments supplied the militants with money, weapons and know-how needed to carry out the assault that precipitated Israel’s ongoing war in Gaza.

The lawsuit, filed in federal court in New York, seeks at least $4 billion in damages for “a coordination of extrajudicial killings, hostage takings, and related horrors for which the defendants provided material support and resources.”

Iran’s mission to the United Nations declined to comment on the allegations, while Syria and North Korea did not respond.

The United States has deemed Iran, Syria and North Korea to be state sponsors of terrorism, and Washington has designated Hamas as what’s known as a specially designated global terrorist.

Because such countries rarely abide by court rulings against them in the United States, if the lawsuit’s plaintiffs are successful, they could seek compensation from a fund created by Congress that allows American victims of terrorism to receive payouts. The money comes from seized assets, fines or other penalties leveled against those that, for example, do business with a state sponsor of terrorism.

The lawsuit draws on previous court findings, reports from U.S. and other government agencies, and statements over some years by Hamas, Iranian and Syrian officials about their ties. The complaint also points to indications that Hamas fighters used North Korean weapons in the Oct. 7 attack.

But the suit doesn’t provide specific evidence that Tehran, Damascus or Pyongyang knew in advance about the assault. It accuses the three countries of providing weapons, technology and financial support necessary for the attack to occur.

Iran has denied knowing about the Oct. 7 attack ahead of time, though officials up to Supreme Leader Ayatollah Ali Khamenei have praised the assault.

Iran has armed Hamas as a counter to Israel, which the Islamic Republic has long viewed as its regional archenemy.

In the years since the collapse of Tehran’s 2015 nuclear deal with world powers, Iran and Israel have been locked in a shadow war of attacks on land and at sea. Those attacks exploded into the open after an apparent Israeli attack targeting Iran’s embassy complex in Damascus, Syria, during the Israel-Hamas war, which sparked Tehran’s unprecedented drone-and-missile attack on Israel in April.

Neighboring Syria has relied on Iranian support to keep embattled Syrian President Bashar Assad in power amid a grinding civil war that began with the 2011 Arab Spring protests. Like Iran, Syria also offered public support for Hamas after the Oct. 7 attack.