Two teenage girls suspected of shoplifting were stopped as they were leaving the Victoria’s Secret store in Herald Square, and a security guard checking their bags found what appeared to be a dead baby inside, police said Thursday. The girls, both 17, were stopped by store security guards, one of whom smelled a foul odor coming from a bag, police said. It was then that one of the girls admitted she had “a baby in the bag,” CBS 2 reported. A guard called police. The girl later told officers that she had given birth Wednesday and did not know what to do with the fetus, which had matured only five to six months, police said.