The Korean Fair Trade Commission (KFTC) may be looking for information on whether the internet giant is allegedly limiting its Android mobile operating system users' access to rival search engines, according to a report by CNET.
The raid was related to complaints made by Korean search engines "such as NHN and Daum" an unnamed source "familiar with the raid" said, according to a Financial Times report.
NHN Corporation and Daum Communications filed complaints with the KFTC in April claiming that Google had "preloaded" its own search engine onto Android-operated mobile phones making it "virtually impossible" for users to switch to another option, NHN had said at the time, according to a New York Times report.
Naver, which is owned by NHN, and Daum are Korea's most used search portals.
Google defended the openness of its Android system and said it would "work with" KFTC "to address any questions they may have about our business," the company said, according to CNET.
"Android is an open platform, and carrier and original equipment manufacturer partners are free to decide which applications and services to include on their Android phones. We do not require carriers or manufacturers to include Google Search or Google applications on Android-powered devices," Google said, according to the report.