Knox to be freed: evidence unreliable

Amanda Knox has successfully appealed her conviction for murdering British student Meredith Kercher, an Italian judge has ruled with the judge saying the evidence was unreliable.

Amanda Knox. (AAP)

American Amanda Knox was acquitted of murder and sexual assault by an Italian appeal court on Monday after four years in custody over the killing of her British housemate Meredith Kercher.

The dramatic ruling overturns a 26-year sentence handed down to Knox in the original trial in which she had been found guilty of murdering Kercher together with her then boyfriend Raffaele Sollecito and local drifter Rudy Guede.

Knox will be freed immediately after the judge acquitted her and ordered her to pay 52,000 Euros.