India's antitrust watchdog said on Thursday that Google abused its position as the dominant search engine in the country to create a search bias in favor of its own services and those of its partners.

The Competition Commission of India said in a statement that it was imposing a fine of 1.36 billion rupees ($21 million) on Google along with a warning to desist from unfair practices.

The regulator has been investigating Google since 2012 when a website called Matrimony.com and the Consumer Unity &Trust Society complained about Google's practices.

According to the complaints, Google manipulated search results to promote its own and partner services.