He said the cause of the argument is unknown and investigations were underway.
"We are waiting for the man to recover," said Hlathi.
Mashego said Mabunda a dedicated employee.
"I'm shocked over the incident which is a heavy blow against the department's efforts to empower young women within the built environment.
"Not long ago, our government embarked on a drive to dismantle the chronic disease of gender-based violence in our society where men were urged to lead the charge.
"It is indeed a tragedy that has reversed our attempts to capacitate our women and youth in the workplace. As a result, the province has lost a valuable asset in our struggle to fast-track service delivery," said Mashego.
In another incident, a 44-year-old man allegedly shot himself after apparently strangling his wife, 44, in Kabokweni on Friday.
In another incident, a 35-year-old man strangled and killed his 25-year-old girlfriend in Vosman in Emalahleni on Saturday after an argument.