A jury that has spent nine days deliberating mail, wire and tax fraud charges against fallen media tycoon Conrad Black and three other executives said it was deadlocked and asked a judge for advice. U.S. District Judge Amy St. Eve briefly called the jurors into her courtroom Tuesday and told them they must make "every reasonable effort" to reach a unanimous decision in the closely watched trial. The jurors returned to their work, then recessed for the day. The jurors' note, read to the court by St. Eve, said: "We have discussed and deliberated on all the evidence and are still unable to reach a unanimous verdict on one or more counts. Please advise." The note was signed by the jury foreman and ended with: "P.S. We have read the jury instructions very carefully."