A vehicle owned by a University of California at Los Angeles researcher was firebombed on Saturday, and underground animal rights groups have taken responsibility for the attack. UCLA Chancellor Gene Block condemned the attack, part of a series against the university's researchers. "The actions of extremists who use violent and illegal tactics are utterly reprehensible and beyond contempt," he said in a statement.  "UCLA police continue to work with the FBI and other law enforcement agencies to bring to justice those responsible for such unconscionable acts, and I encourage anyone with information to come forward." The Animal Liberation Front press office posted a message for the researcher: "We will come for you when you least expect it and do a lot more damage than to your property. Wherever you go and whatever you do we'll be watching you as long as you continue to do your disgusting experiments on monkeys."