The Metropolitan Police has confirmed a body found in the River Brent is that of missing 14-year-old Alice Gross.
United Airlines believes the US Ebola patient flew on its airline from Brussels to Dallas-Fort Worth via Washington on September 20th, based on information provided to the airline by federal officials, a company spokeswoman said.
The US Centers for Disease Control and Prevention said there was "zero risk of transmission" on these two flights because the patient showed no symptoms at the time and therefore could not have been contagious, the spokeswoman added.
The patient, now hospitalized in Dallas, had flown originally from Ebola-ravaged Liberia.
"We are ensuring our employees have this information and suggest that any customers who have concerns contact the experts at the CDC for further information," the spokeswoman said.
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The parents of the missing London teenager Alice Gross have described their devastation at the discovery of her body.
Police said her killer had made significant efforts to hide her body.
ITV News Correspondent Paul Davies reports: