Underground animal rights activists issued a statement Wednesday claiming credit for having vandalized the home of researcher at the University of California at Irvine, by spray-painting "KILLER" across his garage door and pouring red paint on three of his cars. The statement said the researcher was being punished for working with animals and that the action was taken so "all his neighbors could see what a cruel, sick person they live near." A spokeswoman for Irvine confirmed the attack, which she said took place Friday, although she said only two cars were covered with red paint. The spokeswoman said that the research maintains a lab at Irvine but teaches elsewhere. She said he does work with animals: rodents.