A judge will hold a pre-trial hearing in New York today following claims that the suspect prosecutors say was a relative of Osama bin Laden and al Qaida's spokesman after the September 11 attacks might be the wrong man.
Judge Lewis Kaplan ordered the hearing after claims were made on Wednesday on behalf of Sulaiman Abu Ghaith.
Lawyer Zoe Dolan said the defence recently learned there may be a second person with a similar name as Abu Ghaith who is detained at Guantanamo Bay, Cuba. Ms Dolan says the government is believed to have information about the other individual.
A trial is due to begin on Monday for Abu Ghaith, who is charged with conspiring to kill Americans in his role as al Qaida's spokesman after the 2001 terror attacks.
:: An Egyptian Islamic preacher awaiting trial in New York after his extradition from the UK says he will give evidence at his trial in April.
A judge included a letter from the suspect, Mustafa Kamel Mustafa, in a court filing yesterday.
The US government says Mustafa conspired with men in Seattle, Washington, in 1999 to set up a terrorist training camp in Oregon and helped abduct two American tourists and 14 others in Yemen in 1998. He denies the charges.
In a letter to Judge Katherine Forrest, Mustafa says that he will give evidence and plans to discuss all the people, organisations and places in his indictment.