The government agency that owns the World Trade Center (searchsite said Friday it intends to hold Saudi Arabia and nearly 100 other defendants liable for the Sept. 11 (searchterrorist attacks that killed nearly 3,000 people and destroyed the complex.

The Port Authority of New York and New Jersey (searchannounced it planned to join Friday as a plaintiff in a lawsuit filed a week ago by Cantor Fitzgerald Securities, a bond trading firm that lost two-thirds of its workers in the trade center attack.

"We also have a responsibility to the millions of people who live and w Sept. 11," the Port Authority said in a statement. The agency lost 84 of its employees in the Sept. 11, 2001 attacks.

The Cantor Fitzgerald lawsuit named as defendants Saudi Arabia, Al Qaeda, Usama bin Laden and other accused terrorists, along with financial institutions and charitable organizations that allegedly raised money for terrorism efforts.

Cantor Fitzgerald, which lost 658 employees in the attacks, sought $7 billion in damages. It accused Saudi Arabia of supporting Al Qaeda with money, safe houses, weapons and money laundering.

Saudi Arabia -- the birthplace of bin Laden and 15 of the 19 hijackers -- has defended itself as a loyal ally in the fight against terrorism. It cited the Sept. 11 Commission's conclusion that the Saudi government did not fund Al Qaeda.

Still, the commission criticized Saudi Arabia as "a problematic ally in combating Islamic extremism."