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TechCrunch, a leading Silicon Valley technology blog, was attacked by hackers overnight, it said on Tuesday.
TechCrunch, in a blog post, said it was hacked around 10.30pm on Monday (3.30am GMT on Tuesday), came back online around an hour later, but went down once again.
It said the site was back up and stable around 2am (7pm GMT).
TechCrunch said the site was "redirected" by the hackers.
According to web security firm Sophos, the technology blog was linked during the attack to a site "containing links to adult and pirated material".
Tech giant Apple has revealed the iPhone 4S, an updated version of the mega-popular iPhone 4.
Microsoft and Samsung have agreed to a patent deal which will see Microsoft receive royalties.
Apple has sent out invitations to an event expected to be the unveiling of a new iPhone.
