WASHINGTON (CNN) -- A juror in the criminal trial of Lewis "Scooter" Libby was dismissed Monday after the judge determined she had been compromised by exposure to information about the case outside the courtroom.

The third full day of deliberations continues with 11 jurors despite objections by the prosecution that were dismissed by Judge Reggie Walton.

"Rather than throwing away the two days of their efforts to decide this case," Walton announced he would let 11 jurors continue their deliberations.

Two alternate jurors who heard the entire trial were told to remain ready to substitute if needed, but if one joined the jury deliberations would have to begin anew.

Walton told defense attorneys and prosecutors he got word Monday morning from the jury foreperson that "one of the jurors may have been exposed to information related to this case outside the courtroom, and that conceivably, others may, as a result of that, been exposed."

Walton then headed to the jury room to get details and check the extent the information may have spread to others on the jury of eight women and four men.

Of the three notes the jury is known to have sent out so far, this was the first to prompt a discussion in open court among the judge, the prosecutors and the defense.

The first note came last Wednesday and involved office supplies in the hours after the jury was first sent back to deliberate. The second note, Thursday, was a request for pictures of the witnesses.