Florida ? Two men accused of murdering four people last month aboard the charter fishing boat Joe Cool were arraigned on murder, kidnapping and robbery charges Thursday during a brief appearance in Miami federal court.

Attorneys for the two defendants, Kirby Archer, 36, of Strawberry, Ark., and Guillermo Zarabozo, 20, of Hialeah, Fla., entered not guilty pleas on their behalf.

The defendants, shackled at their feet, stood mute.

Each man was charged with four counts of first-degree murder, four counts of kidnapping and one count of robbery in the case that began Sept. 22 when the pair chartered the Joe Cool out of Miami Beach. Archer and Zarabozo are accused of killing Capt. Jake Branam, 27; his wife, Kelley, 30; his half-brother Scott Gamble, 36; and crewman Samuel Kairy, 27.