North Korean artillery was heard Sunday on the frontline South Korean island attacked last week, though no shells landed on the island, South Korea's military said.
One artillery round was heard from a North Korean military base north of the sea border dividing the two Koreas, an official with South Korea's Joint Chiefs of Staff said. He spoke on condition of anonymity, citing office rules.
Residents of Yeonpyeong Island were ordered to take shelter because of the sound, he said. The evacuation order was later lifted.