Zambian mining minister, Yamfwa Mukanga, said that the government had cancelled all three licences held by [Chinese-owned] Collum Coal mine...[and] would "continue operating them until a suitable investor is found"…Mr Mukanga said the mine had a poor safety, health and environmental record." Collum coal mine has failed to consistently provide employees with approved personal protective equipment" he told a news briefing. He added that it did not have emergency medical treatment facilities such as ambulances or a first-aid station underground. As well as the safety issues, Mr Mukanga also stated that the company had failed to pay royalties or properly declare how much coal was produced...The mine in question has been controversial. A Zambian miner was charged with the murder of a Chinese supervisor at the Collum mine last year. In 2010, Chinese managers were accused of firing on protesting miners.