Supporters of New Zealand First said they were concerned for the future of their party as list MP Brendan Horan returned to Parliament.
Greypower Coastal Bay of Plenty and Districts president Ruth Dekker said many of its members were supporters of New Zealand First and were stunned at Mr Horan's expulsion from the party.
"We are waiting with bated breath to find out what the results are. Until there is an inquiry, we don't know.
"Brendan has advised us as a group and so, when you know someone, it does come as a surprise."
Mr Horan's lawyer Paul Mabey, QC, said they were not aware if any police complaint had been laid.
"It's difficult for him and his family because he's the subject of unproven allegations and now he has been expelled from his party without a hearing and he finds that distressing.
"Mr Horan is committed to New Zealand First and would prefer to be a member of the New Zealand First caucus but he can no longer be in that caucus. He is a list MP and that presents difficulties within Parliament but he has done nothing wrong."