Wage negotiations between Eskom and unions appear to have reached an impasse as workers at some power stations down tools.

The power utility and unions have been involved with wage negotiations since early in July when workers downed tools. This along with sabotaged infrastructure saw loadshedding return to some areas.

This morning Eskom spokesperson Khulu Phasiwe has noted that there are incidents of intimidation at some power stations.

In fact the intimidation became so severe that deliveries to some power stations had to be stopped. While the spokesperson said that the grid was stable earlier this morning, that appears to be changing as the day wears on.

“Coal trucking at Majuba & Duvha power stations have stopped due to acts of intimidation. This poses a threat to security of power supply,” Phasiwe said on Twitter.

Eskom has reportedly proposed a salary increase of 21 percent spread over three years with the option of a housing allowance or no housing allowance with an additional 0.5 percent increase on top of the proposed 21 percent salary increase.

The sticking point however, appears to be bonuses. Eskom has said that it is not in a financial position to promise bonuses. Unions such as the National Union of Metalworkers South Africa (Numsa) said last week that a decision to not pay bonuses was a declaration of war and would break negotiations.

For now the power grid remains stable but Phasiwe says Eskom will provide updates throughout the day.