Investigations into the disappearance of a Florida toddler have revealed further 'significant' skeletal remains, which appear to be more children's bones, in the same area a skull was found last week.

The size and the location of the skull, just a few blocks from where the toddler lived with her mother and grandparents, compel investigators to believe it to be that of Caylee Anthony, 2, reported missing since July.

Though, none of the remains have been identified, DNA and other testing is being conducted on earlier finds including the skull.

Casey, Caylee's mother is being held on a first-degree murder charge in the toddler's death.