Turner Broadcasting plans to take responsibility for the “hoax devices” that were found at several locations in and around Boston Wednesday that forced police bomb units to scramble throughout the area. The incidents were part of a marketing campaign that involved a character from the cartoon show “Aqua Teen Hunger Force.” “The ‘packages’ in question are magnetic lights that pose no danger. They are part of an outdoor marketing campaign in 10 cities in support of Adult Swim’s animated television show ‘Aqua Teen Hunger Force,’ ” Turner Broadcasting, the parent company of Cartoon Network, said in a statement. The company said that they have been in place for two to three weeks in Boston, New York, Los Angeles, Chicago, Atlanta, Seattle, Portland, Austin, San Francisco and Philadelphia.