Fire officials responded after the farm owner reported that 10 deer had gotten out, but nearby closed-circuit television footage showed the actual number was five, they said.
Of the five, three were adults and two were fawns, officials said.
Gwangmyeong city sent an emergency text alert at 2:33 p.m., urging residents to use caution and to report any sightings to 119 or city hall.
The farm is believed to be raising about 30 deer, including those that escaped, officials said.
A city official said personnel had been dispatched to the area to search for the animals.
The incident has heightened safety concerns among residents after a recent controversy over a prolonged search for a wolf named "Neukgu" that escaped from Daejeon O-World before it was captured.
* This article has been translated by AI.
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