A fourth American has died after a fatal collision with a truck in Waikato last week.
Griffin Lee, 17, was taken to Waikato Hospital's intensive care unit in a critical condition after the crash north of Tokoroa on Tuesday.
Police said he died in hospital earlier today.
Warren Lee, 53, Aesoon Lee, 52, and their daughter Julia Lee, 20, died in the crash.
Mr and Mrs Lee were American citizens living in Hong Kong, while Ms Lee had been living and studying in Massachusetts. She was due to start studying at the University of Auckland a few days after the crash.