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5 October 2011, 16:09 | Updated: 5 October 2011, 16:46
The site at Valley Road in the town has been kept cordoned off by officers overnight as they continue their inquiry.
Officers are currently working with experts including a forensic archaeologist and anthropologist to try and get more information about the human remains, but they do say the investigation is still at a very early stage.
Hearts been speaking to Suffolk Police:
If anyone has any information in relation to the site or how the remains came to be there they are asked to contact the Major Investigation Team at Suffolk Police headquarters on 01473 613500.