eir has reported a data breach after a staff member's laptop was stolen.
The company says data consisting of names, email addresses, phone numbers and eir account numbers of 37,000 customers has been breached as a result of the theft, which took place off-site.
eir insists that no other personal or financial data of customers was stored on the laptop.
The incident has been reported to the Gardai and the Data Commissioner, and eir is in the process of contacting all affected customers.