| Thousands of people died on 11 September 2001 in the largest terror attack ever on US soil |
Saudi Arabia's foreign ministry has
said it is a matter of "great concern" that 9/11 relatives in the US may
be able to sue the kingdom for damages.
Fifteen of the 19 hijackers that day were Saudi nationals, but the kingdom has denied any role in the attacks.
In a statement, the country's foreign ministry said: "The erosion of sovereign immunity will have a negative impact on all nations, including the United States."
The 9/11 bill row, explained
Their argument parallels the one made by Mr Obama. He said on CNN after the vote that the law set a "dangerous precedent" and could lead to the US being opened to "a situation where we're suddenly exposed to liabilities for all the work that we're doing all around the world and suddenly finding ourselves subject to private lawsuits".