Home Secretary Priti Patel has been accused of bullying staff at a third government department, BBC Newsnight has learned.
The latest claims were reportedly brought to a senior official at the Department for International Development after she quit as its Secretary of State in 2017.
A Tory source said "dark forces" were trying to influence an inquiry into Ms Patel's conduct in her current role.
Ms Patel denies all the allegations.
The BBC reported on Monday that an official in the Department for Work and Pensions (DWP) received a £25,000 payout after alleging she was bullied by Ms Patel in 2015 during her time as employment minister.
The DWP did not admit liability and the case did not come before a tribunal.
