WASHINGTON?Anthrax was discovered in an off-site mail screening facility for the White House Tuesday and separately confirmed as the cause of death for two postal workers in the nation’s capital, the latest bioterrorism victims.

In addition, a mail handler in New Jersey and two more postal workers in Washington were believed to be suffering from the disease.

?We need to treat and to treat quickly,? said Dr. Ivan Walks, the senior health official in the District of Columbia, adding that anthrax had been confirmed inside the central Brentwood mail facility that serves the city. Antibiotics were being dispensed to postal workers across Washington as officials began testing to see if anthrax had spread to local post offices.

At the White House, spokesman Ari Fleischer said anthrax had been found at a mail screening facility for the White House located at a military installation. That facility was closed for testing and decontamination. Fleischer said that all environmental tests at the White House itself have come back negative.