NEW : Backup heading to scene of standoff , Gen. Richard Phillips says . Maersk Alabama leaves scene with armed detail as negotiations for captain continue . NORFOLK , Virginia ( CNN ) -- U.S. Navy assists in negotiations with pirates holding USS Bainbridge . Maersk Alabama in lifeboat . FBI warned that pirates increasing range of operations .
NEW : Backup heading to scene of standoff , Gen. Richard Phillips says . Maersk Alabama leaves scene with armed detail as negotiations for captain continue . U.S. Navy assists in negotiations with pirates holding USS Bainbridge . Maersk Alabama in lifeboat . FBI warned that pirates increasing range of operations .