Widnes have announced that they have terminated the contract of head coach Denis Betts with immediate effect.
The 48-year-old was Super League longest-serving coach, having been appointed by the Vikings since 2010.
Widnes chief executive James Rule said: “Denis can be proud of his contribution to this club over the past eight years.
“Whilst it is regrettable to lose someone of his experience and commitment, we believe that it is now the right time for a change in leadership. Denis leaves with the absolute best wishes of everyone at the club for the future.”
Betts added: “I have been grateful to have had the opportunity to lead Widnes Vikings, as head coach, for eight years.
“It is with sadness that I leave the club, but I feel proud of what has been achieved during my tenure, and of the contributions of our players and back-office staff.
“I would like to thank everyone who I have worked alongside during my tenure at the club, and all who have supported the Vikings both on and off the field. The club has many reasons to be positive for the future, not least the ongoing emergence of its young talent, and I give my best wishes to those who continue to lead the team in the future. I hope that the club continues to progress in the seasons ahead.
“I am looking forward to my next chapter in the game and I am grateful for the considerable experience that I have gained with Widnes Vikings.”
Francis Cummins has been placed in temporary charge as the club consider their options.