Police in Napier were on Thursday still looking for a man 24 hours after he fled Napier Courthouse where he had tried to get past security staff with live ammunition.
While a witness understood a rifle magazine may also been involved, courts acting general manager (health, safety and security) Jonathan Howe confirmed only that a single item of ammunition had been found, carried by a person passing through security scanning at the court entrance about 9.40am on Wednesday.
The man had left by the time police arrived but police have the ammunition and a bag left behind by the man as he left.
Police said on Thursday they were following "strong" lines of inquiry.
The offence of unlawful possession of a firearm in a public place carries a maximum penalty of seven years' jail.