The head of the Saudi Arabia-dominated Gulf Cooperation Council (GCC) is not happy with the recent decision of Congress to allow the families of the Sept. 11 attacks to sue the kingdom's government for damages.

The U.S. House of Representatives passed the "Justice Against Sponsors of Terrorism Act" on Friday but Barack Obama has threatened to veto the bill.

Such laws are "contrary to the foundations and principles of relations between states and the principle of sovereign immunity enjoyed by states," Secretary General Abdullatif al-Zayani said in a statement. He also warned that it would "negatively affect the international efforts and international cooperation to combat terrorism."

Fifteen of the 19 Islamic hijackers who flew the attacking planes on September 11, 2001 were Saudi nationals.

Qatar and the United Arab Emirates also condemned the bill.