One of the biggest web attacks ever seen has been aimed at a security blogger after he exposed hackers who carry out such attacks for cash.
The distributed denial of service (DDoS) attack was aimed at the website of industry expert Brian Krebs.
At its peak, the attack aimed 620 gigabits of data a second at the site.
Text found in attack data packets suggested it was mounted to protest against Mr Krebs' work to uncover who was behind a prolific DDoS attack.
In a blogpost, Mr Krebs detailed the attack, which began late on Tuesday night and quickly ramped up to its peak attack rate.
DDoS attacks are typically carried out to knock a site offline - but Mr Krebs' site stayed online thanks to work by security engineers, who said the amount of data used was nearly twice the size of the largest attack they had ever seen.