By Devon Maylie and James Herron

LONDON--Impala Platinum Holdings Ltd. (IMP.JO) said Wednesday that it has received demands from workers at its Rustenburg mine for a wage increase over and above the one they received to end a six-week strike at the mine in February.

The workers have also requested that an annual pay increase is brought forward from July 1 to the end of April, Impala said in a statement. "We are in discussion with them on this these demands," it said.

The new demands come as violent strikes at South African mines have severely disrupted platinum production, caused a national political scandal and resulted in at least 44 deaths.

The Association of Mineworkers and Construction Union, a breakaway union that has played a major role in recent strikes at South African platinum mines, such as Lonmin PLC's (LMI.LN) Marikana facility, said it was not responsible for the fresh demands.

Impala reported a drop in full-year earnings last month due in large part to the six-week strike that cut into its production and revenue generation.

 
   Write to Devon Maylie at devon.maylie@dowjones.com 
 
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