PITTSBURGH — The Veterans Affairs Pittsburgh Healthcare System wants to fire three workers and discipline four others after another worker complained he was harassed and bound with duct tape, a spokesman said.

Pittsburgh VA officials have refused to provide details of the incident, reported last week at the agency’s hospital in Pittsburgh’s Oakland neighborhood.

But officials said earlier this week five workers have been placed on administrative leave due to the harassment allegations and, on Thursday, confirmed that firing or additional discipline was now being contemplated against seven workers.

Kathi Dahl, the president of the American Federation of Government Employees union local, said the incident occurred in the facilities management department where, she contends, VA officials have been slow to respond to past complaints of bullying. Physical threats by supervisors, fights and verbal abuse have also been reported there in the past, Dahl said.

“I can promise that we will move forward from this and focus on improving the overall workplace environment at VA Pittsburgh,” interim director Barbara Forsha said in a statement.