The Przewalski's Horse is the only species of "wild" horse left in the world. Named after the person that "discovered" them in 1879, they originate in Mongolia and in the early 1900's many were hunted, captured for zoos and exhibits. These factors as well as others caused the breed to go extinct in the wild by 1969.
Yep, this article is right, they were extinct in the wild. Thanks to some special organizations though, they've been breeding them and re-releasing them into the wild. There's a few reserves dedicated to the survival and protection of this breed in Mongolia.