A mineworker died at Anglo Platinum's Amandebult mine in the early hours of Monday morning, the National Union of Mineworkers (NUM) said.

The incident occurred at the mine's number one shaft and the mineworker was apparently killed by a derailed hopper.

"This brings the total number of mineworkers who died to 121 this year.

"The number of mineworkers who died at Amandebult alone is now six," the NUM said.

The NUM called on Anglo Platinum "to pull up its safety socks" and said investigations would begin later in the day,

Anglo Platinum's spokesperson Simon Tebele could not be reached for comment.