New Zealand has 10 confirmed cases of Covid-19 -- but that number is almost certain to rise. 
Three more cases were confirmed late yesterday afternoon, including a 60-year-old woman with a link to the border. 
Officials are now trying to determine whether they're linked to the other seven cases. 
Director-General of Health Ashley Bloomfield told Mike Hosking he's expecting to be informed of further cases, later this morning. 
"We are expecting results for overnight from those household contacts, this Delta variant seems to be very infectious inside households, so I am expecting more cases from those households overnight." 
Almost 70 locations of interest have been identified -- including one going back to the start of the month. 
But Bloomfield says that doesn't mean the virus has been in the community that long. 
"None of our waste water testing suggested any infecton out there, at least until last Wednesday." 
LISTEN ABOVE