Tatiana Brandao, 30, and Raquel Moreira, 28, were rear passengers in a Jeep when it was involved in a collision with a bus.

The pair, who both worked at University Hospital Southampton (UHS), Hampshire, were on holiday in the US at the time.

The crash took place around 8am local time on Friday on a highway in Arizona, which serves as an entrance to the south rim of the Grand Canyon.

On Friday, bosses at UHS paid tribute to the two women.

Gail Byrne, UHS chief nursing officer, said: "The entire nursing family at University Hospital Southampton has been left shocked and saddened by the tragic deaths of two much-loved colleagues as they enjoyed a holiday together in America.

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"The friends were well-known for their kindness, empathy and enthusiasm.

"Both were passionate about nursing and providing the very best care for our patients. Outside of work they shared a love for new experiences, adventure and living life to the fullest."

Ms Byrne said the women were Portuguese nationals.

Tatiana joined the trust seven years ago and was described by Ms Byrne as a "highly respected member of the neurology department".

Raquel had worked at UHS for the past five years and was a "very valued part of the stroke advanced clinical practice (ACP) team".

"I know I speak on behalf of the entire UHS workforce in saying they will be sorely missed. We send our love and condolences to their families at this very sad time," Ms Byrne added.