More than 13,000 email addresses have been hacked through Edinburgh City Council's computer system. Aside from email addresses, no other personal information was accessed or stolen during the assault.
The local authority said in an email to people who have an online account with the council that the attacker invaded the security of one of its web service providers that was based in a UK data centre. Users may encounter an increase in spam or phishing emails as a result.
Alastair Maclean, Edinburgh's director of corporate governance, asked individuals that had their email addresses accessed by the attacker to change any passwords used for admittance to the council's website.
The cyber-attack was quickly dealt with and no council services were affected.