The White House has welcomed a Dubai company's request for a new security review of its planned take-over of some operations at six American ports.

White House spokesman Scott McClellan said Monday that the new review should dispel the concerns of some lawmakers.

He said President Bush remains confident that the $7-billion deal does not present a security problem.

Sunday, Dubai Ports World said it plans to ask U.S. officials to conduct a 45-day review of the proposed deal, which would be broader than an earlier inquiry.

Some U.S. lawmakers, however, say they still have concerns about possible terrorist links to Dubai, and have threatened to block the deal. President Bush has said he will veto any legislation blocking or delaying the deal.

The Treasury Department says the new review will be conducted by the same panel of national security agencies involved in the initial study.

Some information for this report was provided by AP and Reuters.