James Lowes has stepped down as head coach of Bradford, the Championship club announced on Tuesday.
Former Great Britain hooker Lowes announced his departure from Odsal due to personal reasons, less than two years after taking charge at the Yorkshire club.
The 46 year-old, who spent eight seasons as a player with Bradford, rejoined the Bulls in the closing stages of the 2014 Super League season but was unable to save the club from relegation.
"This decision has come with a heavy heart," Lowes said in a statement. "I have had to make this tough call for personal reasons and I request everyone respects that.
"I would like to personally thank the players, directors, staff and especially, all the supporters of this great club for my time here."
Former Bulls captain, and Lowes' assistant coach, Matt Diskin will act as interim head coach for Sunday's home game against Workington.
A statement from Bradford said: "It is with much sadness and reluctance the club has received and accepted the resignation of head coach James Lowes, who has stepped down for personal reasons.
"The club puts on record its gratitude for the significant contribution James has made as head coach during his 22 months at Bradford Bulls and we wish him every success in the future.
"Matt Diskin, with the support of Chev Walker, will act as interim head coach as the process of seeking a replacement begins immediately."
Bradford are currently fourth in the Championship after winning five of their opening nine league games this season.