MELBOURNE, Australia (AP) - Five jockeys tumbled from their mounts and a race was declared void after a flock of seagulls flew into a dozen horses at the Sandown race way in the southern city of Melbourne on Thursday. In fading light for the last race of the day, the jockeys were on the home straight approaching the finish when the seagulls flew into the horses, forcing many to shy away and toss their riders. Five jockeys were injured, including apprentice Brady Cross, who broke his left arm. Race stewards reviewed film of the 1,200-metre race before declaring it a no-race under the provisions of Australian Rule of Racing 139, which deals with "external issues which affect a race," the Australian Associated Press reported. John Noy, deputy chief executive of the Melbourne Racing Club, said seagulls had occasionally been a problem at the Sandown track but staff usually scared the birds off before races.