Bristol have suspended their director of rugby, Andy Robinson, and appointed Mark Tainton as acting head coach with immediate effect.
Robinson has been in charge at Bristol since 2013 and led the club back to the Premiership after a seven-year stint in the Championship.
But Bristol have found the going tough amongst England's elite and are currently languishing at the bottom of the Premiership table after losing all seven of their matches so far this season.
"Bristol Rugby have decided, following the extremely disappointing start to the season, to appoint Mark Tainton as Acting Head Coach with immediate effect," the club said via a statement on their official website.
"The club’s all-time leading points scorer, Tainton has previously coached at International level with Ireland, as well as with Wasps and London Irish in the Aviva Premiership.
"The club have also taken the decision to suspend the current Director of Rugby, Andy Robinson, from his role. The club will carry out an immediate review of their coaching needs and requirements. That review will be completed as quickly as possible."
Bristol chairman Chris Booy said: "This is clearly a very difficult time for the club, but we remain confident we can retain our position in the Premiership.
"The support for the club this season has been outstanding and that continued backing is very important going forward. Thank you."
Bristol will make no further comment until the review is completed.