1. Wide of Supreme Court

2. Exterior of court building

4. Close up of court

5. SOUNDBITE: (English) Dr John Eisold, Capitol Hill Physician:

"Following the same thought process we did last week, we are following the letter so to speak and if there is evidence of a contaminated filter at the off site screening although its a conservative approach for us to take, we are making the assumption that quite possibly something may have come to the mail room here. And as you know there are many mail rooms that have been screened and followed with treatment."

6. Wide of Eisold speaking

7. Wide of mail warehouse sorting facility used by Supreme Court

8. Various of police tape and building

9. Media outside building

10. Post office closed near facility

11. Various of police tape

12. Wide of spokesmen

13. SOUNDBITE: (English) Lieutenant Dan Nichols, US Capitol Police:

"We have determined that we have three locations within the Longworth House offices thus far which have tested positive for anthrax bacteria."

14. SOUNDBITE: (English) Dr. John Eisold, US Capitol Physician:

"We will notify the staffs in those offices and by your press releases reach people who may have visited those offices subsequent to or on the day of the 12th of October on the day that those buildings were closed last week so that we can identify people who may have travelled through those offices or worked in those offices and tomorrow we will start seeing those people and treating them with a course of antibiotics."

15. Wides of press conference

Anthrax was discovered on Friday on a filter removed from a warehouse which screens mail headed for the Supreme Court.

The discovery led officials to make plans to shut the court building down as a precaution.

Federal officials said there was no evidence the microbe had travelled to the court building itself.

But a court spokeswoman said the entire building would be closed and employees sent home and that it would be tested thoroughly.

She added that if any contamination is detected, the building will be decontaminated.

The building was immediately closed to tourists and the ventilation system was turned off in case any material had found its way from the postal screening centre, officials said.

Capitol physician John Eisold declined to say whether any of the nine justices were tested for exposure or whether any are receiving antibiotics.

The justices held a private meeting in the building on Friday morning.

Authorities were taking much the same precautions as they did when anthrax was discovered across the street in a Senate office building, Eisold said.

Court medical workers began testing some of the 400 people who work in the main building on Friday afternoon.

The court was in temporary recess this week, but returns for arguments and other business Monday.

If the building is shut down, the court will borrow alternate court facilities.

Meanwhile trace amounts of anthrax have been discovered in the offices of three lawmakers in a House office building, congressional officials said Friday night, as evidence of bioterrorism spread on Capitol Hill.

The sources, who spoke on condition of anonymity, said tests detected the anthrax in the Longworth House Office Building.

The names of the three lawmakers were not disclosed.

The Longworth building, which provides space for dozens of lawmakers, receives mail that is processed by a machine where anthrax had previously been found.

The machine is located in a separate House office building several blocks away.

The positive tests turned up as Congress struggled to recover from a bioterrorism scare caused by the discovery of anthrax in two Senate office buildings.