S Korea shuts nuclear reactors and warns of power fears
5 November 2012 Last updated at 10:09 GMT
South Korea has shut down two nuclear reactors after it was revealed that some parts used had not been properly vetted, an official has said.
Knowledge Economy Minister Hong Suk-woo said they were "non-core" parts and were not a safety threat but also warned of the possibility of "unprecedented" power shortages in the next few months.
Lucy Williamson has more details.