05 April, 2017
Italian Filippo Di Pierro was "arrested and questioned" a police source said on Tuesday, adding that the investigation is ongoing.
Also speaking to Cadena Ser, Ruiz confirmed the story but said he was passing on orders from Di Pierro.
Eldense ended its contract with the group of Italian investors and temporarily ceased its sporting activities on Sunday, a day after the record-equalling defeat sealed its relegation.
The president of La Liga has since come out and said he will open an investigation into these allegations, noting that the game and the unusual relationship with the Italian investment group that came to own the club "bear the hallmarks of the possible involvement of an global betting ring with a view to match-fixing".
Cheikh Saad told radio station RAC1: 'There are four players involved in match fixing.
"I have received threats not to reveal the names of those involved but I don't care".
Barcelona B were 8-0 up after 45 minutes and rattled in another four in the second half.
Eldense club president David Aguilar said that a player's agent told him that the match had been fixed in connection with online betting.More news: Match Previews: Manchester United v West Bromwich Albion
"I know who they are but I can not say at the moment". He said he had noticed unusual decisions made by the Italian coach recently, including the use of players who had not been playing regularly.
Saad said his suspicion grew before the game when he and another regular starter were left off Saturday's starting XI.
"It is exclusively related to Eldense".
Barcelona are used to inflicting pain and suffering on opponents, but their B team have gone as far as forcing a rival to quit their division.
"And then just before kick-off, I wasn't".
"We have to get to the end of this". What we saw at the Mini Estadi was not football and I was tremendously ashamed.
He arrived in Spain two years ago following his associate, Ercole di Nicola, an ex-player and former executive who was arrested in Italy for match-fixing.
Information from The Associated Press was used in this report.