WASHINGTON D.C. —FCC Chair Brendan Carr has sent a letter to the heads of PBS and NPR telling them that the FCC’s Enforcement Bureau is opening an investigation into the airing of sponsorships on public stations.

Federal Communications Commission Chairman Brendan Carr said he is launching investigations into both PBS and NPR, in the hopes of helping Congress defund the public broadcasters. His basis for the investigation stems from what he alleges are potentially unlawful commercials.

FCC’s Brendan Carr also suggests an investigation could be relevant to conservative congressional efforts to defund the public broadcasters.