Mystery surrounds bones found yesterday down a Heads Rd drain, next to the site of an old Wanganui crematorium.
Police are investigating but are not treating the find as suspicious.
The bones were flushed out of a drain near the site of a crematorium, which has not been used since the 1950s. They have not been confirmed as human.
A police spokesperson said the drain was flushed by workmen yesterday and the pieces were discovered.
"We can't identify then yet and we haven't tested them but we are not treating them as suspicious."