Internet users have been warned about a scam message claiming to be from Scottish police asking to pay a fine for viewing adult content.
Strathclyde Police said officers were aware of a number of incidents where a pop-up window appeared, telling users their machine had been locked.
The message claims they have been viewing adult content and asks users to pay a £100 fine over the phone.
The force said this was an online scam and that inquiries were under way.
A spokesman said: "We would like to assure the public that this is an internet scam and has absolutely nothing to do with Strathclyde Police, and that our organisation never asks the public for money.
"We would urge the public not to follow the instructions on screen or call the number given or send any money.
"Officers are currently carrying out numerous and extensive inquires to trace the source of this scam and would also ask that anyone who has received this scam pop-up on their computer to contact their local police office as soon as possible."