Indigenous Peruvian Achuar communities filed a class action suit against Occidental Petroleum Corp. on Thursday..., claiming oil production has damaged their health and even killed a 6-year-old boy... Occidental officials are perplexed by the suit..., Occidental Vice President for Communications Richard S. Kline told Reuters on Thursday. Last autumn, the indigenous people and Peruvian officials signed off on a decision...that called for Occidental's successor in Peru, Argentina's Pluspetrol, to spend $200 million in environmental remediation and pledge to update pollution controls. "At the time, the leaders of the community said 98 percent of their demands had been met," Kline said. Kline said Pluspetrol in 1999 "assumed all obligations for past, present and future operating conditions." The plaintiffs said they did not include Pluspetrol in the suit because of its pledge to clean up.