20,000 feared dead after New York attack
Officials in New York say up to 20,000 people may have died in the suicide attacks on the city's World Trade Centre.
It is thought 10,000 died in a shopping mall in the centre and a further 10,000 may have perished in the twin towers.
Mayor Rudolph Giuliani says the best estimate is that "there will be a few thousand left in each building".
At a news conference he confirmed that the city had requested 6,000 body bags from federal officials.
Meanwhile, FBI investigators believe between 12 and 24 hijackers were invloved in seizing the four planes which crashed into the World Trade Centre, the Pentagon and outside Pittsburgh.
They also revealed that they believe up to 50 people were involved in planning and executing the attacks.
The FBI is following about 2,000 separate leads in their investigation.
