"It would be a very, very serious issue indeed if it is proved to be correct."
Heath Mills, head of the Players' Association, told the Herald that he had been made aware of the investigation and knew the players involved.
"This is a sad day for all of us but people need to remember that 99.99 per cent of those playing and working in cricket are hard-working, dedicated and honest folk."
Former New Zealand batsman John Morrison said he would be very disturbed - and surprised - if the allegations proved to be true.
"I do detest it. It goes against every grain of sportsmanship that I think New Zealanders have always regarded as very sacred."
He urged people not to jump to conclusions but conceded "all New Zealand cricket followers and players will be very disturbed to hear this".
Morrison said match-fixing was never an issue when he was playing in the 1970s and early 1980s but cricket seemed to have become more money-oriented since then.
Nash told Prime News the allegations were serious.
"It's obvious they are serious allegations as well and against players that I played with and friends of mine, so that's something you don't take lightly either. It's not nice news to hear."
Former Black Caps all-rounder Andre Adams said he had received an email from the Players' Association advising him not to comment on the issue. "I really can't talk about it right now, sorry," he said.
Mills denied the association had gagged players, saying they had been advised not to comment because of the judicial nature of the allegations.
Meanwhile, boxing promoters Duco Events said the December 14 charity fight between Chris Cairns and fellow commentator Simon Doull would go ahead.