An 82-year-old woman has been the victim of a daylight sex attack in Bletchley, described by officers as "horrendous".
The woman was assaulted as she walked on a path near Buckingham Road at about 13:00 on Friday.
A man, described as white and in his early to mid-20s, with a large build, pushed her to the ground and attacked her before walking off.
He was wearing a black beanie hat, black jacket and black trousers. He was carrying a black rucksack over both shoulders.