Are Spacecraft Killing Thousands of Antelopes In Kazakhstan?

Three years ago, 12,000 rare and endangered antelope carcasses were mysteriously found in Kazakhstan. Nobody knew what happened to them. Exactly one year later, people found 450 new dead bodies. No causes were found. Now, they have found another 1,000 corpses and nobody knows what is killing them yet.
 But some scientists think they know the answer: a spacecraft killed them all.