World Trade Center owner Larry A. Silverstein is suing the remaining insurers of the twin towers after negotiations over how much they would pay for the loss broke down.

Marc Wolinsky, one of Mr. Silverstein's attorneys, said that the 19 insurers involved were not originally named in legal action against Swiss Re because of settlement talks going on at that time. But those talks have since reached an "impasse," he said. Mr. Wolinsky is a partner at the New York law firm of Wachtell, Lipton, Rosen & Katz.

According to a release, World Trade Center Properties LLC, an affiliate of Silverstein Properties, filed an action in federal court in Manhattan last Friday against Travelers Indemnity Co., a subsidiary of Citigroup Inc.