South Korea's science ministry said technical problems had occurred during preparations for the third flight of its homegrown space rocket ahead of liftoff on Wednesday, and local media reported the launch would be rescheduled.
South Korea is aspiring to be a key player in space technology, competing with its Asian neighbors.
Media reports said the launch would be rescheduled for later this week.
In June 2022, the country successfully launched its domestically produced Nuri rocket and placed working and dummy satellites into orbit in its second test.
The third test would be the first to load and launch a commercial-grade satellite aboard the Nuri vehicle.