WASHINGTON (Reuters) – Four U.S. senators urged the Federal Trade Commission on Thursday to investigate Amazon.com Inc’s smart speakers aimed at children, claiming the devices violate a privacy law that protects children.

Senators Edward J. Markey, Richard Blumenthal, Dick Durbin and Josh Hawley asked for the probe, saying the smart speakers captured information about the children, allegedly in violation of the Children’s Online Privacy Protection Act (COPPA).

Amazon denied any wrongdoing. “FreeTime on Alexa and Echo Dot Kids Edition are compliant” with the act, an Amazon spokeswoman said.

The senators said in a letter the Amazon Echo Dot Kids Edition does not comply with COPPA because it does not live up to parental consent requirements and does not allow parents to delete private information about