MOSCOW — Russian opposition and human rights groups today urged Western consumer products giants to stop “financing politically motivated persecution” by advertising on a Kremlin-friendly TV network known for its biased coverage of government critics and demonstrations against President Vladimir Putin.

In the wake of unprecedented anti-Putin protests that followed last December’s rigged parliament vote and Putin’s return to the Kremlin in May, NTV has run dozens of news reports, talk shows and pseudo-documentaries accusing opposition leaders of plotting coups and terrorist attacks, of receiving money from Western governments, and of hiring migrant workers and neo-Nazis to participate in anti-Putin rallies.

The White Ribbon movement, the Moscow Civil Forum and the For Human Rights group said in an open letter today that the broadcaster has become part of the Kremlin’s “machinery for repression.”

In a statement directed at companies such as Coca-Cola, Procter & Gamble, Nestle, and L’Oreal International, the three groups said: “Please consider stopping to place your company’s advertising on the NTV channel because it is a way of financing politically motivated persecution.”

NTV reports have prompted several official investigations of opposition leaders and triggered at least two arrests. NTV coverage also has triggered rallies at the company’s Moscow headquarters.