Eastern Platinum saw production of the precious metal in the three months to June 30 from its Crocodile River mine in South Africa climb by 1% from the previous quarter, but output was held back by the dismissal of staff due to safety concerns.The company produced 30,820 tonnes of platinum during the quarter, up from 30,531 the previous year.'The contract crews were dismissed due to management's concerns over their safety procedures,' Eastern said. 'Lost-time injury frequency rate (LTIFR) was 2.78, compared to 1.77 in Q1 2010.'Elsewhere in African mining, shares in uranium exploration and development company Uranium Resources jumped after it announced that it has raised £800,000 through a subscription of 40m shares at 2p a share.It will use the funds to explore its uranium prospect Mtonya in southern Tanzania.