Mineworkers drill at the rock face at the Impala Platinum mine in Rustenburg, South Africa. Impala Platinum Holdings Ltd is the world's second-biggest platinum producer. Photographer: Nadine Hutton/Bloomberg News

Platinum priced in rand rose by 3.3 percent to reach its highest level so far this year on Wednesday, boosted by the weakness in the currency and by spreading violence and unrest in the South African mining industry.

Platinum priced in rand was up at 13,405.7 rand an ounce, its highest since mid-November, set for its largest one-day gain in a month.

The rand was last down 0.4 percent against the dollar, but still held around one-month highs against the US currency.

South African police said striking miners had blockaded roads leading to shafts belonging to Anglo American Platinum, the world's largest platinum producer. - Reuters