Foxconn Technology Group, which makes Apple iPhones and iPads on the mainland, said a fire yesterday broke out at one of its factories in Shandong province, but no one was hurt. The blaze started in one of the facilities at the company's Yantai complex at about 10am. 'The situation was quickly brought under control by the fire department, and there were no injuries associated with this incident,' the company said. 'An initial investigation indicates that an exhaust pipe on the roof of the building was a possible source of the fire.' Foxconn said it was co-operating with the local authorities as they conduct further investigations. According to witness reports on microblogs, a plume of black smoke could be seen from more than 10 kilometres away. A witness wrote that the fire was brought under control by 10.50am after more than 10 fire trucks were dispatched to the scene. It was the second fire to break out at a Foxconn factory on the mainland in less than five months. On May 20, a fire at the company's complex in Chengdu, Sichuan province, killed three people and injured 15. Foxconn, founded by Taiwanese tycoon Terry Gou, is the world's largest contract manufacturer. It also makes consumer electronics products for companies such as Sony and Hewlett-Packard. Last year, Foxconn scrambled to improve conditions at its plants after a string of worker suicides. Gou has been shifting production lines to inland cities like Chengdu and Chongqing, where labour is about a third cheaper than in the southern region. The Yantai plant is Foxconn's third-largest production base, employing nearly 80,000 workers. Its mainland factories employ more than 920,000 people, with its biggest factories in Shenzhen and Shanghai.