FIRST Bus has confirmed its investigations are ongoing into social media posts "made by a number of staff".
The company, which operates in Bradford, said it takes allegations of racism "extremely seriously".
First Bus has not confirmed exactly how many employees were being investigated.
A spokesperson for First Bus told the Telegraph & Argus today: "Our investigations are ongoing and remain confidential to ensure fairness for all involved.
"First Bus is committed to taking appropriate action based on the findings of these enquiries and upholding our standards of professionalism and inclusivity."
At the end of last month, the spokesperson said: "We have been made aware of social media posts by a number of staff and are urgently investigating these in accordance with our internal procedures.
"We take any allegations or incidents of racism extremely seriously.
"Discriminatory language and behaviour has no place in First Bus and we will not tolerate any form of racist content posted or shared on social media, including personal accounts.
"This is an ongoing investigation and we are unable to disclose further details at this time."
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