Victorian stewards expect to lay charges relating to higher than normal betting patterns on a country race at Echuca.

An investigation began following a large volume of bets being matched against Baron Archer to lose a race at Echuca on March 8.

Racing Victoria chief steward Terry Bailey stressed the owners of Baron Archer, who include AFL champion Gary Ablett Jr, were not part of the investigation.

Bailey said even though it was the Echuca Cup meeting, the amount of bets matched was double, and in some cases treble, the amount of bets matched on other races on the day.

Baron Archer was having his first run back following throat surgery and finished third in the five horse field as the $2.80 favourite.

"There's two accounts of interest that we're looking at and that's ongoing," Bailey told Melbourne's RSN radio.

"They are accounts that are familiar to us.

"We're at the pointy end of this and I would say the next seven days, whatever falls out of it, will fall out."

Bailey said the investigation began immediately after the race when the control room at Racing Victoria informed stewards officiating at Echuca of the large volume of bets.

Stewards on the day had no issues with jockey Ben Melham's ride on Baron Archer.

Bailey said stewards were also inquiring into trainer Jason Warren's failure to inform them of a tie-back operation that Baron Archer had undergone.

"For whatever reason, stewards weren't informed about that so that's another angle of the investigation that is ongoing," Bailey said.