31歲的Nicholas Papworth，來自Houghton Regis的Amble Close；32歲的Curtis Long，來自Luton的Hallwicks Road；以及40歲的Mark Griffiths，也被指控犯有兩項謀殺罪，一項謀殺未遂罪，三項陰謀謀殺罪和三項陰謀造成嚴重身體傷害罪，他們將於2月27日面臨認罪聽證，審判日期暫時定在5月9日。
A third man also sustained serious injuries and three men have already been charged over the incident.
Anthony Bennison, 24, from Edgware in London, appeared at Luton Magistrates' Court and was remanded in custody to appear at Luton Crown Court on Wednesday.
Mr Bennison, of Millfield Road, is charged with two counts of murder, one count of attempted murder, three counts of conspiracy to murder, three counts of conspiracy to cause grievous bodily harm and a two counts of attempted grievous bodily harm.
Nicholas Papworth, 31, of Amble Close, Houghton Regis; Curtis Long, 32, of Hallwicks Road, Luton; and Mark Griffiths, 40, of Luton, have also been charged with two offences of murder, one of attempted murder, three of conspiracy to murder and three of conspiracy to cause grievous bodily harm and are due to face a plea hearing on 27 February, with a trial date provisionally set for 9 May.
Police also said a fifth man has been arrested as part of its investigation and he has been released on police bail.
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