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The NSW Premier Dominic Perrottet says there is no place for bullying and harassment in the workplace amid allegations against one of his ministers.
Fair Trading Minister Eleni Petinos, who is responsible for keeping the state's workplaces safe, rejects accusations of improper conduct linked to her office.
"I value my staff and endeavour to provide a professional and safe environment for them," she told AAP on Friday.
Mr Perrottet earlier said there was zero tolerance for bullying in any workplace, including the NSW government, and he had spoken to Ms Petinos after a complaint was made.
"I raised those allegations that I had received. She denied those allegations," Mr Perrottet told reporters in India where he's on a trade mission.
The premier said the complaint and the process that followed proved the system for workplace complaints worked.
"I have implemented as premier the strongest public workplace procedures and practices anywhere in the country ... to ensure confidence, particularly for people who are in a workplace where they don't feel safe," Mr Perrottet said.
He denied the allegations against Ms Petinos.
"It's just hell," one unnamed staffer told News Corp when describing the working conditions in the minister's office, adding "I felt unsafe".
The same report claimed one of Ms Petinos' former advisers lodged a complaint with the Department of Premier and Cabinet about being "relentlessly bullied" by others while at work.
Ms Petinos, who looks after workplace safety as part of her ministerial portfolio, has had up to eight staff members leave in the past seven months, according to the reports.
In a statement to AAP, the department said it had not received any complaints about Ms Petinos' office.
"I take my responsibilities as a local member and minister seriously and expect that my staff are as committed in delivering for my constituents and the people of NSW as I am," said Ms Petinos, who is on annual leave.
Labor Leader Chris Minns called the allegations "horrific" and said Ms Petinos needs to provide an explanation.
"There wouldn't be a workplace in any part of this country where someone wouldn't be immediately fired if these allegations are true," he said on Friday.
Labor frontbencher Courtney Houssos labelled the reports as troubling.
"I'm particularly concerned about the impact that these would have had on young women in her office, perhaps during their first political job," she said.
Mr Perrottet's trade mission to Japan, Korea and India has included daily questions about issues on the home front, including the appointment of former deputy premier John Barilaro to a lucrative overseas role.
The Barilaro scandal has also enveloped Trade Minister Stuart Ayres, who joined the premier in India on Wednesday.