This site may be hacked.

Delete the sitemap and create a fresh one and submit it on Google webmaster tools. Wait for Google to index it.
 
I found that issuse some hack redirect rule in htaccess file thanks all ...
 
my site showing (This site may be hacked) only google search engine. but how can solve this problem?
I'm trying to find problem but i can't. how can find it problem solution.
I need help.
 
Take backup and build your site again from scratch, that's the best thing you can do.
 
Lol, this warning often shows up when you got "hidden" or aka stealth links placed on your website. In other words, sape links. G has gotten better at detecting this.

Try to view your page's source (as it may not be visible otherwise in some cases) and see if it contains link to other domains (mostly near the footer area).
 
I have faced this issue before. Your site would have a lot of spammy links outgoing to other domains which may be either casino links or other links which are termed spam by Google. You need to track the file from your FTP where this malicious code has been placed and remove them. Once removed, you can use any site security scanner paid service which will secure your website.

Alternatively, if you want to try something of your own free, install Wordfence plugin of wordpress if its in wordpress and run scans. You should be able to track the code.

Thanks
 
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