Police have spent a third day at a central Auckland building site as they investigate the killing of Carmen Thomas.
The 32-year-old has not been seen since late June and police believe her body was dismembered and disposed of.
Her former partner, Bradford Callaghan, was last week charged with murder.
Along with the investigation by detectives and forensic investigators at a construction site on Victoria St, police say inquiries are still being made at a house in east Auckland.
They are not ruling out further arrests.