Amit Agarwal is one of the best Blogger all over the world, he has a good reputation in the blogging world and also as a person. He have appeared on TV many times. His blog is the most read blog in India, Labnol is an one man blog ran by Agarwal.
Labnol was started in 2004 and made its journey to 2012 very well and more and more people started reading Labnol because of it's quality content which is written by Amit Agarwal.
We get to know about this via Amit Agarwal's twitter update on his twitter @labnol, here's the embedded tweet
Difficult times. Hackers have deleted all my websites.
— Amit Agarwal (@labnol) July 1, 2012
His website Digital Insipiration, IndianBloggers, CTRLQ including his main tech blog Labnol, he stated that all his websites has been deleted, the above sites are some websites i know about, but there might be more sites of him.
At this time it's hard for me to say what is the exact reasons and cause behind this, because i don't have any certified news yet, this all happened 3 hours ago and as far as i know Amit is trying his best to recover his sites.
We hope that all his websites start working again and nothing bad happened to his sites. When i get more information i will update this post.