N. Vinayakumaran Nair, assistant commissioner of police, who heads the Hi-Tech Crime Enquiry Cell, said a probe had begun following a complaint from the parents of the woman whose picture was misused.
"We have written to the site which posted the picture. It should have been removed by now," Nair told IANS.
He said soon after the picture was posted, there were numerous comments saying it was fake.
"We are certain we will soon find out how this happened," he said. Nair did not disclose the complainant's name.