An antitrust investigation into Google’s dominance in the search market is being considered by the Federal Trade Commission, according to the Bloomberg report.

However, before the FTC decides whether to launch such an investigation it needs to wait for the decision of the Justice Department that considers whether to challenge Google's planned $700 million purchase of airline ticketing software company, ITA Software Inc, Bloomberg said, citing the sources with the knowledge of the matter.

The FTC and the Justice Department share responsibility for probing antitrust claims and may negotiate which of them would lead the main investigation into Google.

The Justice Department could soon announce its decision on Google's purchase of ITA, the people told the news agency.