CBI was actually Hacked By Hamza, Know as Zombie_KSA. He is from Kingdom of Saudi Arabia. He is famous Pakistani Hacker, member of PAKbugs! Have hacked alot BiG sites! Including 3 Indian banks, 4 Indian police websites! Indian CID!! and Now CBI also hacked by him etc !! Also He hacked FIA, to show FIA that how much their website is Secure! But actually The Site was hacked by Hamza (Zombie_Ksa).
Source: https://thehackernews.com/2010/12/cbi-was-actually-hacked-by-hamza.html