(Updates with more details)
JOHANNESBURG, Sept 9 (Reuters) - South African coal producers have raised their wage offer to unions, a spokeswoman for the chamber of mines, which negotiates on behalf of the industry, said on Wednesday.
The spokeswoman could not provide any further details and unions will need to take the offers back to their members.
A union source said the offer for lower-paid miners had been raised to a range of between 6 to 7 percent, depending on the mine and category of worker, from a previous offer of 5.5 to 6.5 percent.
For more highly skilled and higher-paid categories, the offer now on the table is for wage hikes of from 4.5 to 5 percent, the union source said.
Workers want pay increases of up to 15 percent from the producers, which include Glencore GLEN.L , Anglo American Coal AAL.L and Exxaro EXXJ.J .
Global coal prices have fallen by around 10 percent this year, their lowest in nearly a decade, bringing pain to top producers including Indonesia, Australia and South Africa. ID:nL5N10A528