"Ludogorets announced on its official website the resignation of its management and sports and technical staff.
"The entire Ludogorets management and technical staff resigned a few minutes after the record-breaking defeat to Nordsjælland on Thursday.
By this act, the management and sports and technical staff take full responsibility for the defeat in Denmark, which is one of the biggest for the team in the history of performances in European competitions.
More details in the coming days," reads a statement on the club's official website.
In the first round of the Conference League group stage, Ludogorets defeated Spartak Trnava 4-0 at home, but two weeks later was defeated by Nordsjælland 1-7.