A 25-year-old factory worker sustained fatal burns and two of his colleagues were in critical condition yesterday following a furnace explosion at the site of the mining and metallurgical company Larco in Larymna, central Greece, where another worker died earlier this month. According to witnesses, the 25-year-old and four colleagues had been about to empty molten ore from a cauldron when the receptacle cracked and spattered them with blazing liquid metal. Two workers were transferred to hospital with critical burns along with two others who suffered less serious injuries. In the meantime local police detained factory managers while the Development Ministry ordered the closure of five furnaces at the factory site. Earlier this month a 36-year-old factory worker was burned alive at the same site when a wagon transporting molten mineral ore toppled off its tracks.