"The museum CCTV system has been extremely helpful but at this stage I am not prepared to say how it has assisted this investigation ... It has told us a few things that occurred on the night."
Police, accompanied by about 20 military police, started canvassing all occupants of the Waiouru township and military camp today, asking people where they were at the time of the robbery and if they heard or noticed anything unusual.
Mr Bensemann said police were still seeking help from anyone in Waiouru or surrounding area on Saturday night or early Sunday morning.
"There must be someone out there that saw something, however small it might be, that could assist in solving this investigation."
He would not confirm reports that police were focusing on a van parked across the road from the museum at the time of the robbery.
Meanwhile ESR scientists finished their work at Waiouru today and returned to Wellington with material collected from inside and outside the museum.
Police had hoped to return the museum to army control late today, so it could be reopened to the public.
But after detectives reopened their investigation at the scene this afternoon, Mr Bensemann said there were "still some areas of interest that I wish covered off", so they were going to remain there for another day or two.
Photographs of the stolen medals and biographic details of the recipients would be placed on the police internet site later today. The same details would be distributed to overseas authorities.
Mr Bensemann said he would consult with police headquarters about the $200,000 offer from British medal collector Lord Michael Ashcroft for information leading to the stolen medals' return.
He said it was a "generous and gracious offer" but he wanted to establish whether it would help or hinder the police operation. He hoped a decision on the offer would be made within a couple of days.
The 0800 information line, 0800VALOUR, has been used by members of the public to pass on information to the police inquiry team which has grown to 40 officers.
The army has provided the team with office space in the Waiouru Military Camp, along with accommodation and meals.
- NZPA