A hacker apparently got into the emergency alert system in Montana and issued a warning of dead bodies rising from graves and attacking the living. People in the area called the police to make sure it wasn't real, lol.

This message did not originate from KRTV, and there is no emergency,” the station said. “Our engineers are investigating to determine what happened and if it affected other media outlets.”

RT report:
http://rt.com/usa/news/zombie-apocalypse-emergency-warning-973/

Winnipeg free press:
http://www.winnipegfreepress.com/breakingnews/tv-stations-emergency-alert-system-hacked-viewers-warned-zombies-rising-from-their-graves-190770721.html