Police are hunting for a rapist after an 83-year-old woman was attacked in Glenrothes.
It happened shortly after 5am within a property at Meldrum Court.
A man in dark clothing got entry into the property before committing the serious sexual assault.
Detective Chief Inspector John Anderson of Fife CID said: "This was an abhorrent act and extensive enquiries are now ongoing to identify the individual responsible.
"We are exploring all possible lines of enquiry, including careful study of available CCTV.
"A highly visible police presence is in place in the area and that will remain while our investigation continues.
"I would ask people to make sure their homes are as secure as possible at all times, including making sure all doors and windows are locked, particularly during the hot weather that we are experiencing when they may be tempted to leave a window open.
"I would urge anyone with any information about this incident or who saw anyone acting suspiciously around the area overnight to come forward as soon as possible.
"You can pass information to police on 101, quoting incident 0647 of June 25, or call Crimestoppers anonymously on 0800 555 111."