CBI officials told on Saturday, Dec 4 that they were working to restart the website, which was hacked by unknown person who claimed as "Pakistan Cyber Army". But till now the CBI official site (http://cbi.nic.in/) has not been fixed.
While trying to login to the site, it is showing error message, which states that the site is still offline. The hackers have infiltrated up to the root level, which makes it difficult to fix the issues.
On Friday, Dec 3, a group of Pakistan hackers attacked Indian sites including CBI site. Hackers left a note reading that it was a response to attack on Pakistan websites by Indian hackers.
Later on Saturday, CBI had filed an case against unknown people under Information Technology Act for the attack on the site.