Published: Jun 13, 2013 3:14 PM EDT

CHARLESTON, W.Va. (AP) - Four U.S. senators are asking Nickelodeon to ban ads targeted at children that promote and sell junk food and sugar.
Joining West Virginia's Jay Rockefeller in the letter sent this week to Nickelodeon and its parent company, Viacom, were Sens. Dick Durbin of Illinois, Richard Blumenthal of Connecticut and Tom Harkin of Iowa. Rockefeller says the letter is aimed at taking steps to ensure kids can live healthy lives.
Nickelodeon says in a statement it is committed to fighting childhood obesity but will "leave the science of nutrition to the experts."
Last June, the Walt Disney Co. banned junk food ads on its television channels, radio stations and websites.
According to the Centers for Disease Control and Prevention, 28 percent of West Virginia children are considered either obese or overweight.

(Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)