According to a post made by news.bitcoin.com
"A South Korean shopping mall has banned merchants from mining cryptocurrencies. They mainly targeted miners of bitcoin and ethereum. They cited electrical costs as the main issue. It appears that many cryptocurrency miners used the Yongsan Electronics Market to conduct various mining operations. They were also concerned about starting a fire, suggested reports from the Korea Economic Daily."
The original Report Stated
“As merchants who run PCs (diggers) in virtual shopping malls are South Korean Shopping Mall Prohibits Bitcoin Mining increasing in the shopping mall, there are complaints about power consumption and room temperature rise as well as fire worries.”
Management of the market also said that an increase in electrical costs would be applied to merchants bills. It appeared like the mall’s representatives was ready to crack down on all underground operations within its location. The report also stated the air conditioning was not working well since the miners took up residence."
excerpt from news.bitcoin.com