McVeigh will be executed on June 11

The US Attorney General says Oklahoma bomber Timothy McVeigh will be executed on June 11.

The execution was delayed for a month after the FBI admitted it had failed to hand over documents to McVeigh's lawyers.

But Attorney General John Ashcroft said these documents contained no evidence to delay the execution any further.

McVeigh's bomb at the Alfred P Murrah federal building in 1995 claimed 168 lives. He was due to die by lethal injection on May 16 at a federal prison in Terre Haute, Indiana.

Mr Ashcroft ordered a one-month delay after the FBI said it had discovered documents which were not disclosed to the defence during McVeigh's 1997 trial.

The attorney general emphasised the belatedly produced documents represented "less than one percent" of the hundreds of thousands of pages of other evidence.

"No documents created any doubt about his guilt, let alone established his innocence," said Mr Ashcroft.

He went on to briefly outline the nature of some of the missing documents, which included newspaper clippings sent in by a person under psychiatric care, and offers from psychics to assist in the investigation.

McVeigh's lawyers are considering whether to seek another delay in his execution, apply for a retrial or to challenge his death sentence.