Seoul, Jan 18 (IANS): North Korea has sent around one million propaganda leaflets across the border into South Korea amid mounting tensions after Pyongyang's claim of its first hydrogen bomb test.

North Korean forces have been scattering anti-South Korean leaflets since last Wednesday, Xinhua quoted South Korea's defence ministry spokesman Kim Min-Seok as saying on Sunday.

About one million copies have been dispersed, he claimed.

The leaflets, criticising South Korean President Park Geun-hye, were floated by balloons from North Korea into Seoul and northern regions close to the inter-Korean border.

North Korea's leafleting came as tensions mounted on the Korean peninsula after Pyongyang's claim on January 6 of its first H-bomb test.

As part of retaliatory measures, Seoul resumed blaring anti-Pyongyang propaganda messages from loudspeakers along the border. North Korea also restarted its propaganda broadcasts.

The two Koreas had stopped warfare in border areas since 2004 after a historic inter-Korean summit in 2000.

Seoul briefly resumed the propaganda broadcasts in August 2015 in protest against explosion of landmines planted by North Korean forces which maimed two South Korean soldiers.