BANGKOK (AP) — Thai officials said Monday they have traced to a recycling foundry a metal cylinder with radioactive contents that was discovered earlier this month missing from a power plant, but advised that there appeared to be no public health hazard. Narong Nakhonchinda said that traces of Caesium-137 were detected Sunday in bags of furnace dust that was a byproduct of the smelting process at the foundry, which is about 10 kilometers (6 miles) from the power plant. Police say they suspect the cylinder had been stolen for sale as scrap