Gardaí are investigating the alleged impersonation of a government minister by a prank caller.
A caller to a restaurant seeking a table booking was abusive to staff and claimed he was junior minister Patrick O'Donovan.
The restaurant contacted Mr O'Donovan and told him what had happened. He reported the incident to gardaí.
Officers are now investigating the matter as menacing behaviour.
The incident happened in Limerick on December 13 when the caller rang a restaurant in Rathkeale seeking a table.
The restaurant was booked out, and the caller then claimed to be Mr O'Donovan, a TD in Limerick. The manager subsequently called Mr O'Donovan to tell him about the incident.
When contacted, Mr O'Donovan would only say it was now a garda matter.
Gardaí confirmed they were investigating as it is illegal to impersonate someone.
A security source said the phone number would now be traced.