Two people who had recently returned from Liberia have died in New Jersey after being admitted to a New York City hospital on Tuesday, hospital officials said.
The two people were in their 20s and 30s and had recently traveled from Monrovia to New York, the New York Hospital Association said.
The two died of respiratory failure and the cause of death was not immediately clear.
The New York Department of Health and Mental Hygiene has said the patients had been discharged from a New Jersey hospital on Thursday after being re-tested and tested negative for Ebola.
In addition to the two patients, another three patients were released from a hospital in New Orleans on Monday.
The US has said it is “well aware” of three cases of Ebola in New Zealand.
Two New Zealand doctors who were treated in the US for Ebola are currently in isolation in Auckland.
Ebola has killed more than 11,000 people worldwide, mostly in Africa, with most cases occurring in West Africa.
New Zealand has reported three new cases, including one in a nurse who returned to New Zealand in October after being treated in New Mexico.
The country’s health ministry said on Wednesday that it was monitoring a third New Zealand nurse who arrived in the country on Monday, after having previously been in New Hampshire.