Google's Seoul offices were raided by a South Korean antitrust agency on Tuesday, apparently due to the limited access of Google's rival search engines on the company's Android OS.

The Korean Fair Trade Commission (KFTC) entered Google's offices on Tuesday morning and planned to return on Wednesday morning, according to Reuters' anonymous source familiar with the matter.

Google issued a statement Tuesday to defend its position, and stated that the search engine giant intends to comply with Korean regulators, reports CNET.

We will work with the KFTC to address any questions they may have about our business, said Google. Android is an open platform, and carrier and OEM 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.

In April, two top Internet portals in South Korea, NHN and Daum Communications, filed with the KFTC claiming that Google was unfairly controlling competition in the mobile search engine market.

On Android smartphones, Google search engine is installed as a default tool, and the way it is designed makes it virtually impossible to switch to another option, says the joint complaint.