Check from CP ,His Ip or Location or try to prevent ASAP, cause it will harm your account, once google disable account, it will very difficult to get back
I just found some suspicious Ips and sent them to google. Should I do something more? And How can I block this Ips to block from my blog
I wouldn't worry about you having to stop this, as Google will look into the matter and most likely won't credit these "clickers" much longer. Basically don't worry about doing Googles job, as if this is legit fraud and you are not apart of it, you should be in the clear. Otherwise competitors would simply click bomb your account into a blacklist.
Go to this link and inform Google before they disable your account...act fast.. http://www.google.com/support/adsense/bin/request.py?contact_type=contact_policy
your account may be close due to spam click..you can block custom outsider ip from your server side..