A third woman has died a month after a helicopter crashed into a New York City river during a sightseeing tour.

The New York medical examiner's office says 60-year-old English tourist Harriet Nicholson died early Sunday of "respiratory complications of near-drowning," meaning a shortage of oxygen to the brain.

Nicholson was aboard the helicopter with her husband, daughter and her daughter's partner on Oct. 4 when the pilot lost control shortly after takeoff. The helicopter crashed into the East River.

Nicholson's daughter, 40-year-old Sonia Marra, was found dead in the wreckage. Marra's partner, 43-year-old Helen Tamaki, died a week after the crash. Tamaki was a New Zealand citizen.

Nicholson's husband and the pilot survived.

The National Transportation Safety Board is investigating the crash and hasn't yet released a final report.