Hackers claiming links to international activist group Anonymous defaced dozens of websites belonging to Australian businesses and Philippine government agencies on Sunday.
A group calling itself Anonymous Indonesia posted on Twitter a list of more than 100 Australian sites it had hacked, saying the action was in response to reports of spying on Jakarta by Australia. The spying claims were contained in documents released by Edward Snowden.
The websites, defaced with a message reading "Stop Spying on Indonesia", are mainly owned by small Australian businesses and seemed to have been chosen at random.
Last week's reports that the Australian embassy in Jakarta was being used for spying prompted Indonesia to summon the Australian ambassador on Friday.
In a separate incident, a group calling itself Anonymous Philippines said on Facebook it had hacked Philippine government sites with a message seeking support for a protest demanding the abolition of "pork barrel funds" - money activists say is used for political patronage.
"We apologise for this inconvenience, but this is the easiest way we could convey our message to you, our dear brothers and sisters who are tired of this cruelty and this false democracy, tired of this government and the politicians who only think about themselves," read the message.