Harmony Gold (NYSE:HMY) suspended all its operations in South Africa effective from the nightshift on Thursday, after two more fatalities were reported at the North West-based Kusasalethu and the Free State-based Joel mines yesterday, bringing to 10 the total number of deaths at its operations this week.

“The past two days have been tragic for Harmony, having lost our colleagues at three of our operations in three separate events. This is unacceptable,”  CEO Graham Briggs  said in a statement .

No blasting activities would take place for the next 24 hours as the company undertakes safety shifts at all its mines.

“During these safety shifts, general managers will lead their senior teams underground, re-enforcing safety messages and procedures, particularly in respect of critical safety areas. Unions will play an important role throughout this process in facilitating engagement and supporting leadership,” he added.

The accidents at Harmony this week are among the worst since a fire at a Gold Fields (NYSE:GFI) mine in 2012, which killed five people.

For almost 10 years, the country's mining industry has been focused on reducing mining fatalities. According to Chamber of Mines' latest data, that there were 112 fatalities at mines across the country in 2012—the lowest figure recorded—compared with 220 in 2007.