A British combat medic who had been voulenteering in Ukraine was found dead 'in her bed' on Christmas Eve.
The body of former chemistry student Katherine Mielniczuk was found in capital Kyiv in the early hours of Sunday morning by members of her unit.
It is believed she was serving in the 151st unit of the Special Operations Forces.
Ukrainian volunteer organisation Project Konstantin took to social media to make the announcement of the 25 year old's death.
British combat medic found dead 'in her bed' in Ukraine
Project Konstantin
A spokesperson from Project Konstantin said: "It is with deep regret that we announce the passing away of Katherine Mielniczuk.
"‘We learned of this dreadful news a couple of hours ago and after talks with her family, we have offered to help.
‘All we know is that she was discovered in her bed this morning (December 24 2023), the cause of her death at this stage is not being treated as suspicious.
"Further information will be released later by the authorities."
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The statement added: "For now, we're focusing on the pain that her family is enduring and we're trying to appease their suffering by affording them the chance to fly out to Ukraine and we want to assist with repatriation costs.
"‘Rest in peace, Apache [a reference to her call sign]."
Mielniczuk, or 'Kat' as she was nicknamed, was serving as an instructor and combat medic with a group calling itself Menace Medics.
According to a post on her blog, she had spent the last 18 months volunteering in Ukraine in a 'medical and operational capacity, primarily with StaySafeUA, a volunteer group dedicated to supporting those 'living on the frontlines of Russia's invasion.'
MailOnline reports that she gave an interview to a local reporter in July where she said she had been working in Bristol
She then decided to sign up for Ukraine saying she felt it was her ‘duty to help.’
In a post on November 28, she said she had spent her 'first days [in an] ambulance donated for me', sharing a photo of a puppy that appeared to be inside the vehicle with her.
An investigation has now been launched into her death by authorities.