Stewards cleared Australian Turf Club officials of any wrongdoing after a bizarre false start trigerred horses to be pulled up at various stages shortly after a race start at Warwick Farm on Wednesday.

Sirens flashed and wailed in the back straight only seconds after the field for the third event had left the barriers.

ATC starter Dale Jeffs declared a false start when he had concerns the barriers had opened intermittently.

Stewards opened an inquiry into the matter, but found the barriers did in fact open in unison.