DES MOINES — Iowa's attorney general said his office is joining a multistate investigation to determine whether Facebook has violated any antitrust laws.

Nebraska is also involved in the inquiry.

Attorney General Tom Miller says Facebook's dominance over communications and information is concerning and warrants the investigation he's leading along with eight other attorneys general.

Miller says the goal is to determine whether Facebook's actions "may have endangered user data, reduced the quality of consumers' choices, or stifled competition." He says the inquiry is in the early stages and has reached no conclusions.

Facebook said in a statement Friday it plans to "work constructively" with the state attorneys general and welcomes a conversation with policymakers about competition.

The other states involved in the inquiry are Colorado, Florida, New York, North Carolina, Ohio, Tennessee and the District of Columbia.

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