ESB Networks has warned customers of scam text messages that appear to come from them, as people around the country wait for their power to be restored.
The utility company urged people not to share personal information with the scammers.
As many as 100,000 customers may be without power beyond next Friday after Storm Éowyn battered the country.
In a statement, ESB Networks said: "We ask that customers do not engage directly, do not share any personal information if asked, and block and report the suspicious number if necessary."
An Garda Síochána said that phone fraud which is also known as 'vishing' or 'smishing' involves criminals contacting you by phone (vishing) or by text (smishing) pretending to be your bank, credit card issuer, utility company or a computer company.
During the conversation, they will try and trick you into giving personal, banking or security information.
Scammers may also convince you to make a money transfer to them. Their goal is to use this information to commit fraud against you or other people in your name.
Gardaí advised the public to always independently verify requests for information.
A spokesperson said not to use the contact details supplied to you by the caller or texter.
They added to never share private information with unsolicited callers or texter
