A 19-year-old man has been sexually assaulted by two other men aged in their 40s in Kent.
Police said the incident happened on Tuesday afternoon in Unicumes Lane, Maidstone, near the railway bridge.
Det Insp Ian Rogerson said it was a serious assault that happened in broad daylight.
He said the lane was regularly used by dog walkers and people crossing the River Medway and urged any witnesses to contact officers.
"Someone must have seen something and if you were in that area between 1pm and 4pm yesterday afternoon please get in touch," he added.