Updated

In yet-another blow to MTV’s controversial show “Skins,” Subway has pulled out of all advertising spots amid allegations of the show’s use of child pornography, according to the Hollywood Reporter.

While ads for the sandwich chain appeared on the premiere episode last week, a rep for Subway tells THR that they “will not be advertising on [Monday’s] episode.”

Subway is the fourth major sponsor for the show to pull out of the show’s advertising after the Parents Television Council (PTC) began targeting advertisers last week. Taco Bell was the first company, followed by Wrigley and General Motors, as FOX411 first reported.

Tim Winter, president of the PTC, said in a statement FOX411, "Every single advertiser who sponsored the premiere episode of 'Skins' is not only endorsing but glorifying teen drug and alcohol abuse, not to mention a plethora of baseless sexual content."

Last week, reports of a 17-year-old actor alternating between nudity and an appeared state of arousal also prompted the PTC to call on Congress to investigate the show for child pornography.

"In addition to the sexual content on the show involving cast members as young as 15, PTC counted 42 depictions and references to drugs and alcohol in the premiere episode. It is clear that Viacom has knowingly produced material that may well be in violation of [several anti–child pornography laws],” they said in a statement.

But MTV is standing by the show, telling FOX411 "We are confident that the episodes of 'Skins' will not only comply with all applicable legal requirements, but also with our responsibilities to our viewers.

“We also have taken numerous steps to alert viewers to the strong subject matter so that they can choose for themselves whether it is appropriate."

The PTC is also aiming to convince L’Oreal, Foot Locker, Orbit chewing gum and Extra chewing gum to pull spots from the show.