South Korea's military has put off a plan to fly anti-Pyongyang propaganda leaflets to the Democratic People's Republic of Korea (DPRK), Yonhap news agency reported Sunday, citing a defense ministry official.

"Leaflet distribution had been put off due to weather conditions so far, but we have now decided to put it on hold for the time being, considering the political situation," the ministry official said on condition of anonymity.

Distributing propaganda leaflets is among a series of measures South Korea plans to take in retaliation for the alleged DPRK's sinking of a South Korean warship in March, which killed 46 sailors.

Other steps include halting trade with DPRK and resuming loudspeaker propaganda broadcasts along the border.

DPRK has denied any responsibility for the warship sinking, and strongly protested South Korea's punitive measures.

DPRK also vowed on Monday that if South Korea deploy propaganda loudspeakers along the border line, the DPRK military would fire at and destroy them, the official Korean Central News Agency (KCNA) reported.

Seoul has resumed FM radio propaganda broadcasts into DPRK while preparing to launch loudspeaker broadcasts on the heavily armed border. The loudspeaker campaign, which had been expected to begin in mid-June, is also likely to be put on hold, Yonhap said.

The two sides agreed to halt decades of propaganda warfare against each other under a 2004 deal struck following the first- ever summit of leaders in 2000.