"All I know is that somehow they were caught up in the tsunami. I believe they were holidaymakers."
He understood that they had been staying one of the resorts most affected.
Mr Dolphin said that it was possible that other New Zealanders may have been injured as reports continue to come in.
"A large proportion of the south coast has just been obliterated," he said
He said he was trying to get there from Apia to assess what was needed and how New Zealand could help.
Authorities were to meet later today to decide how much aid was needed.
"Our two priorities are first of all to establish that as many New Zealanders as we can track down are safe and well, and secondly to establish what needs the Samoan government has and how we can meet them."
"But most don't register when they are just coming for a short holiday."
The earthquake, at 6.48am at a depth of 35km, was centred 205km south of the Samoan capital of Apia, and 2685km northeast of Auckland.
The Ministry of Foreign Affairs and Trade is advising New Zealand's to defer non-urgent travel to Samoa.
Air New Zealand sent up a larger than usual plane today in order to accommodate a higher demand for departures.
* Click here to donate to the Red Cross' Samoa earthquake/tsunami appeal.