The incident happened at New Thursby nursing home on Clifton Drive over the weekend.
Police have made an arrest following an incident at a nursing home in Lytham St Annes.
We were called shortly before 5am on Sunday (August 4th) to reports an unknown male had been found in a room of New Thursby Nursing Home on Clifton Drive with a resident.
Enquiries are very much ongoing but at this point we are investigating a sexual assault.
It is believed the man forced entry through a ground floor window. He was disturbed by a member of staff and it is understood he left through the same window.
Last night officers arrested a 16-year-old from Blackpool on suspicion of rape and burglary. He remains in police custody.
Detective Inspector Jamie Lillystone, of Blackpool Police, said:
“First and foremost our thoughts remain with the victim and their family, who are being cared for by professionals and being supported by specialist officers.
“We have had a team of officers working tirelessly on this investigation since Sunday, and we have today made an arrest.
“However our investigation is very much ongoing and we are continuing to appeal for information. If you know anything at all that could help with our enquiries, we need to hear from you. If you were in the area at around 5am on Sunday and saw anything suspicious, or have any CCTV or dash cam footage that may be useful, please contact us.