The Association of Mineworkers and Construction Union (AMCU) in South Africa has rejected the revised wage offer by platinum mining firms Anglo American Platinum (Amplats), Impala Platinum (Implats) and Lonmin, and will continue with its marathon strike.

The mining firms said in a joint statement that the AMCU has informed the companies of its decision to continue with the strike, which is now entering its 15th week.

The companies claimed that to date, the strike has cost employees around ZAR7.3bn ($694m) in lost income and that producers have lost about ZAR16.4bn ($1.56bn) in revenues.

The three companies are offering an increase of up to 10%, which they say will take the minimum cash remuneration for entry-level underground employees to ZAR12,500 ($1,200) a month, by July 2017.

AMCU president Joseph Mathunjwa was quoted by Reuters as saying: "There are no talks scheduled."

Lonmin has asked employees to declare their decision on the settlement offer by 8 May, with a provisional return-to-work planned for 14 May, depending on the responses received.

Impala is communicating with employees to determine its response to the offer.

On 20 January, the AMCU issued a strike notice to Amplats, Implats and Lonmin, seeking an increase in basic salary rates to ZAR12,500 ($1,200) a month.