FORT MEADE, Md. — Military prosecutors preparing to try Pfc. Bradley Manning said on Wednesday that they would introduce evidence that Osama bin Laden requested and received from a Qaeda member some of the State Department cables and military reports that Private Manning is accused of passing to WikiLeaks.

The prosecutors also said they would present logs of Internet chats in February 2010 between Private Manning and Julian Assange, the founder of WikiLeaks, including one in which the two men appeared to be “laughing” together about a New York Times article. The March 17, 2010, article said that the Pentagon had listed WikiLeaks as a threat to military operations and security.

The military judge hearing the case, Col. Denise Lind, said Private Manning’s trial would be postponed until at least June 3 to allow consideration of classified information that may be used. The trial is expected to take roughly six weeks.

Private Manning, 25, formerly a low-level intelligence analyst in Iraq, could face a sentence of life without parole if convicted on all charges, including aiding the enemy.