A group has claimed responsibility for hacking the Hobart International Airport website and posting a statement supporting the radical Islamist group ISIS, also known as Islamic State or IS.
Tasmania Police say messages identical to the one that appeared on the site early Sunday morning have been posted on thousands of websites worldwide since late 2014.
"The group claiming responsibility for the hacking appear to non-discriminately target organisations who use web hosts such as the one used by Hobart International Airport," a police statement said.
Hobart Airport's website remains disabled on Sunday night, with police investigating and monitoring activity on the ground at the airport.
"There were no threats made towards the Hobart Airport or flight operations to and from the airport," the police statement said.
Police are supporting airport security arrangements and said they were "prepared to provide an appropriate response".
Airport customers are advised to visit airline websites for flight information.
"We're sorry, the Hobart Airport website is not currently operating," a message on the site reads.
"We are working to get it back up and running as soon as possible."
The airport said it was working with IT service providers to review the website's security, after it was hacked about 3.30am.
"Website defacing is a type of attack on a website that changes the visual appearance of a website," a Hobart Airport statement said.
"The airport website was defaced with pro-Islamic militant messages.
"We are working to have the airport website back up and operating for our customers as soon as possible."
