Days after FEMA's chief spokesman said concerns about formaldehyde wouldn't stop it from selling or donating surplus disaster trailers, the agency now says it's reviewing the policy.

FEMA headquarters has issued an advisory to media outlets that says the agency is "reviewing a number of policies related to travel trailers."

The agency provided about 120,000 travel trailers to victims of hurricanes Katrina and Rita. Some occupants last year began reporting illnesses, including nosebleeds and headaches.

The spokesman said in an e-mail to The Associated Press on Friday that the agency would keep selling and donating the trailers, but the advisory issued Wednesday says the report quoting the spokesman was in error and that all the policies are currently under review.