DENVER (AP) _ A federal appeals court reaffirmed Wednesday its decision that federal authorities can hand over evidence to Oklahoma authorities for a state murder trial in the Oklahoma City bombing.

Terry Nichols had challenged the ruling, claiming the court abused its discretion in lifting a ban on federal cooperation with Oklahoma officials still investigating the case.

Earlier, the 10th U.S. Circuit Court of Appeals rejected similar claims by Timothy McVeigh.

McVeigh and Nichols said releasing the information risks prejudicing any fair trial if their federal convictions are overturned.

But the judges said their argument ``hinges on a speculative, rather than concrete, potential for harm.''

Nichols was sentenced to life in prison on conspiracy and involuntary manslaughter convictions in the April 19, 1995, bombing of the Alfred P. Murrah Federal Building, which killed 168 people.

McVeigh was convicted of murder, conspiracy and weapons-related charges and sentenced to death.