Google's South Korea offices have been raided once again -- this time, over alleged antitrust violations. According to the Wall Street Journal, the Korean Fair Trade Commission (KFTC) stormed Google's Seoul offices on Tuesday, amid claims that the company unfairly stifles competition by making its search engine the default option on Android handsets. South Korea's largest mobile search operators, NHN and Daum Communications, filed a complaint with the KFTC in April, claiming that Android is "systematically designed" to discourage users from switching to different portals, and that Google excludes competitors by delaying OS certification for phone manufacturers that attempt to pre-load devices with other search engines. Similar charges, as you may recall, fueled an FTC investigation in the US, where anti-competitive allegations have been flying around for a few months, now. Google neither confirmed nor denied that yesterday's raid took place, but a spokesperson said the company would "work with the KFTC to address any questions they may have about our business," adding that its OS does "not require carriers or manufacturers to include Google Search or Google applications on Android-powered devices."