Police are hunting a male flasher who indecently exposed himself to a retired woman.
The incident happened at a house on Gloucester Avenue in Accrington at 11pm on Friday, November 1.
DC Andy Bleasdale said the number of indecent exposures in the area has increased since the start of the year and has appealed for information.
He said: “We have had several incidents of this since the start of the year and they all appear to be in the area near Accrington Victoria Hospital between Queens Road West and Burnley Road.
“It appears this man likes to target single ladies between the ages of 40 and 60 who are on their own and have the lights on.
“We would ask people in those areas to keep their curtains and blinds closed during the winter months.”
If anyone has information they should call Lancashire Police on 101.