Tongan citizens Sione Taumalolo, 11, and Talita Moimoi, 33 died when the bus went off the road near Gisborne.
Newstalk ZB reports many more were injured.
The bus was carrying students and teachers from a Tongan college, who were here to perform a church concert on Christmas Day. There were 53 people onboard.
Local woman Kristina Williams, who was one of the first people on the scene, said she started the page in an effort to help.