Image caption The case against Raffaele Sollecito (L) and Amanda Knox (R) has received much publicity in Europe and the US 
 
 The Italian judges who reinstated the guilty verdict against Amanda Knox say she delivered the fatal knife blow to UK student Meredith Kercher. 
 
 Explaining their ruling, the judges said Knox and her Italian ex-boyfriend, Raffaele Sollecito, killed Miss Kercher after a violent argument. 
 
 Knox and Sollecito were originally convicted of the murder in 2007. 
 
 They were acquitted on appeal in 2011, but that ruling was overturned in January. 
 
 Knox, who is currently in the US, was sentenced to 28 years and six months. Her former boyfriend received 25 years. 
 
 Both had pleaded not guilty. 
 
 'Fought over money' 
 
 Explaining its reasoning on Tuesday, the appeals court in Florence said the victim's wounds indicated multiple aggressors. 
 
 The judges said they believe both Knox and Sollecito wielded knives, as another man, Rudy Guede, held the victim down and committed a sexual assault. 
 
 But it was Knox who "delivered the only mortal blow", striking Meredith Kercher with a kitchen knife, presiding judge Alessandro Nencini concluded. 
 
 The prosecution had originally argued that Miss Kercher was killed in a sex game that spiralled out of control. 
 
 But in its explanation, the appeals court agreed with a later theory that she was killed after a violent quarrel. 
 
 It said Knox and Miss Kercher had fought over money on the night of the killing. 
 
 In a statement on Tuesday, Knox said the court's reasoning was "not supported by any credible evidence or logic". 
 
 Both Knox and Sollecito are expected to appeal against the latest decision. 
 
 The trial will now go back to Italy's highest court, the Court of Cassation, which could uphold or overturn the verdict. 
 
 If it upholds it, officials are expected to begin the lengthy process to extradite Knox from the US, where she returned on her release from prison in 2011. 
 
 Meanwhile, Guede is already serving a 16-year prison sentence after being convicted of Miss Kercher's murder at an earlier trial. 

 Amanda Knox rejected an Italian court's contention Tuesday that she slit her British roommate's throat, saying there was still no credible evidence that she was involved in the 2007 murder. 
 
 "I want to state again today what I have said throughout this process: I am innocent of the accusation against me," Knox said in a statement Tuesday after the Florence court that convicted her of the killing of Meredith Kercher released a 337-page explanation for its decision to reinstate guilty verdicts against her and her former boyfriend in January. 
 
 The judges' announcement Tuesday means the verdict can go back on appeal to the Supreme Court of Cassation. If it confirms the convictions, a long extradition fight is expected for Knox, who has been in the U.S. since 2011, when an earlier conviction was overturned. 
 
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 The judges said Kercher, 21, was killed by multiple attackers, including Knox's boyfriend, Rafaelle Sollecito, and small-time drug dealer Rudy Guede. But it was Knox "who lashed the deadly wound to the throat" shortly after the women had a heated argument about money, they said. 
 
 The fight with Kercher became increasingly aggressive, the court said, adding that the group had gathered to use drugs before the 2007 murder. 
 
 The judges also concluded that Kercher was stabbed by "two different knives," one of which was held by Knox — although it said Sollecito and Guede were equally responsible for the murder. 
 
 "Meredith was immobilized and was unable to put up any useful resistance due to the fact that she was overpowered by a number of aggressors and simultaneously stabbed with the blades," they said. 
 
 Kercher was found dead in a pool of blood in the apartment she and Knox shared in the Italian university town of Perugia. Knox and Sollecito were found guilty of murder in 2008 and sentenced to 26 years in prison but served only four years before the sentences were overturned. 
 
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 In March 2013, Italy's highest court dismissed that acquittal — slamming the lower court for "contradictions and inconsistencies" in its decision. At a new trial in January, the pair were convicted again. 
 
 Knox said Tuesday that the appeals court's reasoning failed to account for the absence of her DNA in Kercher's room and for the lack of any other "reliable forensic evidence." 
 
 "In fact, in the prior proceeding in which I was found innocent, the court specifically concluded that the forensic evidence did not support my alleged participation in the crime and further found that the circumstantial evidence was both unreliable and contrary to a conclusion of guilt," she said. 
 
 — Henry Austin and M. Alex Johnson with The Associated Press
– Amanda Knox is not only guilty of murder, she was the one out of three attackers who delivered the fatal blow to roommate Meredith Kercher in 2007, according to the Italian judges who reinstated her guilty verdict earlier this year. The judges, in a 337-page explanation of their decision, say Kercher's wounds indicate multiple attackers, but while Knox's boyfriend Raffaele Sollecito and drifter Rudy Guede share responsibility for the murder, it was Knox who cut her roommate's throat after the two women had a heated argument about money, the BBC reports. Knox rejected the judges' decision, saying it was "not supported by any credible evidence or logic," NBC reports. "In the prior proceeding in which I was found innocent, the court specifically concluded that the forensic evidence did not support my alleged participation in the crime and further found that the circumstantial evidence was both unreliable and contrary to a conclusion of guilt," said Knox, who has vowed that she won't go back to Italy willingly. Both she and Sollecito are expected to appeal the decision, while Guede is already serving a 16-year sentence for the killing.