Gulf states have expressed concern over a bill passed by the U.S. Congress that would allow the families of the victims of the September 11 terror attacks to sue the Saudi government for allegedly supporting the terrorism, Voice of America reports.

The Gulf Cooperation Council, which is composed of six member-states, including Saudi Arabia, said the bill "contravenes the foundations and principles of relations between states, notably sovereign immunity."

The U.S. House of Representatives passed the legislation Friday, despite White House threats to veto it. The Senate passed the Justice Against Sponsors of Terrorism Act (JASTA) back in May.

The White House opposes the legislation, considering that it could worsen U.S. ties with Saudi Arabia, expose U.S. citizens overseas to legal prosecution risks and serve as a precedent for lawsuits against the U.S. from foreign countries. A White House veto can be overridden with votes from at least two-thirds of House and Senate members.

Fifteen of the 19 airline terrorists involved in the September 11 attacks were Saudi nationals, but Riyadh denies allegations that the country’s government played any role in the attacks or supported organizations linked with terrorists.