People have been urged to ask for identification before letting workmen into their homes following suspicious activity in Kirkham.
Two men knocked on the door of an 85-year-old woman’s home and told her they were doing building work nearby and there had been a problem with a water pipe.
They came into the house and asked her to run some water so that they could test it.
The men did not show any identification and no known water works were taking place in the immediate area.
The men were described as being in their late 30s.
One had short dark hair, was clean shaven, around 5ft 9 - 10, stocky, and was wearing an olive green type anorak and jeans. The other was slightly shorter, had a scarf wrapped around his face and was wearing an olive green anorak and dark jeans. One of the men had an Irish accent.
A flat bed truck was also seen near the property.
Nothing was taken during the incident.
PC Ian Massey said: “While no offence was committed on this occasion, this is often a ploy used by distraction burglars to gain access to people’s homes and they particularly target the elderly.
“We would ask people to be very careful when someone calls unexpectedly at their door, never let anyone in without having seen identification and checking it out.”
Anyone with information about the incident is asked to contact police on 101.