TOKAIMURA, Japan (AP) - Government inspectors began searching the offices of 20 nuclear facilities around the country Monday as it intensified the probe into practices that ignited Japan's worst nuclear accident. The government also said the operating procedures of all nuclear power companies will be examined after discovering that the company that ran the uranium-processing plant did not follow government-mandated procedures. The Science and Technology Agency inspected the site of Thursday's accident and questioned officials of JCO Co., the private company that ran the plant in Tokaimura, 70 miles northeast of Tokyo. The three workers responsible for the accident were using bucket-like containers to mix the uranium, the national Asahi newspaper reported Monday. They were also on the assignment for the first time and skipped some steps to get the job done as quickly as possible, it said.