'Large' pool of human blood in Wellington tunnel not suspicious

A "large" pool of human blood found in a Wellington pedestrian tunnel more than a week ago has been deemed "not of a suspicious nature".

Around 10.40pm on October 4, police were called after blood was found in the Coutts St pedestrian underpass in Rongotai, which runs under Wellington Airport to Miro St in Miramar.

"Further enquiries have determined the blood was human blood, and police did not locate anybody in the surrounding areas at the time of attendance," Senior Sergeant Steve Wescott said at the time.

In an update this afternoon, police said officers "can confirm the matter is not of a suspicious nature, and no further police involvement is required".

"Police would like to thank those who brought this to our attention, and all that provided information after the fact."

Police were unable to confirm to 1News the circumstances behind the discovery.