A statement on Friday revealed that English football's governing body had been made aware of suspicions by the Gambling Commission, and that it would be "assessing the evidence" and contacting all clubs in the division to advise them.
"The FA and the Gambling Commission have become aware of suspicious betting activity on a number of matches played in the Football Conference South," the statement read. "Following recent communications with the Gambling Commission, the FA, in conjunction with the Football Conference, is contacting all clubs playing in the Football Conference South to advise them immediately of our concern about this suspicious activity."
Specific details regarding which games and teams involved were not disclosed.
"Clubs have also been asked to remind their players and officials of their responsibilities under the betting and integrity rules of the FA," the statement continued. "Anyone with any information regarding possible breaches of these rules has been advised to come forward to the FA or to the Gambling Commission.
"In the meantime, we are continuing to work together with the Gambling Commission's Sports Betting Intelligence Unit in further assessing the evidence regarding these suspicious betting patterns."