Jafr's mayor, Mohammed Mleihan, got caught up in the paper's prank and said he sent security authorities in search of the aliens.
"Students didn't go to school, their parents were frightened and I almost evacuated the town's 13,000 residents," Mleihan told The Associated Press. "People were scared that aliens would attack them."
A Jordanian security official, speaking on condition of anonymity in order to discuss security issues, said an emergency plan was almost enacted in Jafr.
Mleihan said he may sue the daily for its "big lie," but added that the paper had called to apologize for the inconvenience caused by the joke.
Al Ghad's managing editor, Moussa Barhoumeh, tried to defuse the situation, saying the report has been "blown out of proportion."
"We meant to entertain, not scare people," he said.
Orson Welles cause a similar uproar in 1938 with his infamous "The War of the Worlds" radio broadcast. The live drama's fake news reports about a Martian invasion sparked panic among listeners who thought its portrayal of the attack was true.