Media reports that Home Secretary Priti Patel is distrusted by intelligence chiefs and bullied her staff have been dismissed as "false" by the government.
Officials have denied that MI5 held back information from Ms Patel, following allegations that officials lacked confidence in her abilities.
She has also been accused of trying to force out Sir Philip Rutnam, the most senior civil servant in her department.
The pair were both said to be "deeply concerned" by the "false allegations".
