The Singapore Art Museum found its website had been hacked on Thursday, in the second cyber intrusion to have hit the museum in less than a month.

It was alerted by the Infocomm Development Authority that its website was "among a list of 1,500 vulnerable websites posted in the public domain," said the museum on Friday night.

Internal investigations found that unauthorised links had been added to a specific page of the website. They were removed immediately and a police report was filed. No data was compromised, said SAM.

On Nov 20, SAM revealed that the personal information of about 4,000 people on its online mailing list was compromised.

The names, e-mail addresses, phone numbers and, in some instances, nationalities of these individuals were illegally published on New Zealand-based storage website mega.co. nz for at least two hours on Nov 5 before the webpage containing the data file was taken down.

The museum immediately lodged a police report and removed the data file stored on SAM's website.