A major police search for a missing 76-year-old woman from Witney has entered its fourth day.

Iona, whose last name has not been released, has not been seen since 11am on Monday (February 12).

Thames Valley Police and other emergency services have been looking for her in Witney since Monday afternoon.

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Drones and helicopters have been used to search the River Windrush after a person was spotted in the water.

The force said yesterday (Wednesday) that it was growing “increasingly concerned” for Iona’s welfare.

She was last seen wearing brown three-quarter length coat with fur around the hood, leggings and black Nike trainers.

Police described her as 5ft 6in tall and of slim build.

Anyone with information should call 999 or visit the force's website, quoting reference number 43240068765.