Families of the victims and insurers had accused the Arab state of providing material support to terror group al-Qaeda.
But US District Judge George Daniels said Saudi Arabia could not be tried for the damage claims.
He said: "The allegations in the complaint alone do not provide this court with a basis to assert jurisdiction over defendants."
Sovereign immunity means the the sovereign or state cannot be sued. » | Tom Parfitt | Wednesday, September 30, 2015