Kosmo! reported that five fake Facebook accounts using the names of members of the Pahang royal family had been set up.
The accounts had been set up using the names of Tengku Abdullah Sultan Ahmad Shah and Tunku Azizah Aminah Maimunah Iskandariah.
Special officer to Tengku Abdullah, Abdul Rahim Othman, said they had lodged a police report on the matter.
He said the person behind the accounts had made comments on the page that tarnished the reputations of Tengku Abdullah and Tunku Azizah.
"There are two fake accounts using Tengku Abdullah's name and three using Tunku Azizah's," he added.
Abdul Rahim said Tengku Abdullah and Tunku Azizah had asked him to lodge the police report on their behalf.
OCPD Asst Comm Abdul Aziz Salleh said initial investigation showed there was no element of sedition.