North Korea seemed to have expanded broadcasts to all of 11 locations where South Korea's military restarted sending propaganda messages from loudspeakers along the border, the Yonhap news agency reported, quoting an unnamed government official.
Seoul forces resumed the psychological warfare on Friday, two days after North Korea said it had successfully tested its first hydrogen bomb, reports Xinhua.
On the same day, the North Korean forces reportedly restarted propaganda broadcasts in two sites in response.
South Korea's Defence Ministry spokesman Kim Min-Seok told a press briefing Monday that the DPRK forces are airing propaganda messages from loudspeakers in frontline areas, without elaborating on details.
North Korean broadcasts reportedly involve music praising top leader Kim Jong Un and its regime, and messages denouncing South Korean President Park Geun-hye.
The South Korean broadcasts include the criticism of the DPRK leader and its regime as well as recent pop music, world news and weather forecasts.