The pair allegedly jumped into the Mary River to avoid police.
Isabel and Judy Stephens from Benalla went missing last weekend.
The search will resume on Monday.
They failed to return home yesterday.
The NZ national's mate has issued a public plea to locate his friend.
But search continues for missing 16-year-old Cassie Olczak.
The 7-year-olds went missing in rugged NSW bushland.
The five-year-old ran away on Sunday.
Police and merchant ships had been looking for the missing passenger.
The missing Australian tourist was last seen at a Rio apartment on May 21.