A police probe into an alleged match-fixing scandal has led to the arrests of six men, including former Bolton Wanderers player Delroy Facey.
The latest developments follow incidents earlier this year in which UK bookmakers stopped taking bets on matches featuring AFC Hornchurch, Billericay Town and Chelmsford City due to integrity concerns.
Conference South clubs were reminded by the Football Association in March "to remind their players and officials of their responsibilities under the betting and integrity rules of the FA".
Criticised for not doing more to investigate the issue, the FA say they have "worked closely" with authorities regarding the latest allegations.
An FA spokesman said on Wednesday night: "The FA has been made aware of a number of arrests in relation to an NCA investigation. We have worked closely with the authorities in relation to these allegations. The FA will make no further comment at this time due to ongoing investigations."
However, the Football League's chief executive, Shaun Harvey, said the body had not been contacted over the investigations.
"The threat of corruption is something the Football League and other football authorities treat with the utmost seriousness. The integrity of our matches and our competitions is the bedrock of the domestic game."