MOSCOW, October 8 (RIA Novosti) - A South Korean anti-communist group plans to attach 300 pocket radios to balloons and drop them in North Korea, to help people tune in to South Korean broadcasts, Seoul's Yonhap news agency reported.

The announcement is likely to irritate the North Korean government, which has previously protested against propaganda leaflets sent via balloons by South Korean activists.

Yonhap quoted a statement from the Fighters for Free North Korea (FFNK), a group consisting of activists and former North Korean defectors, as saying they will send the radios on Saturday, the 64th anniversary of the North's Workers' Party.

In October last year, the North Korea threatened to carry out military strikes against the South if activists continued to send propaganda leaflets criticizing the regime and "slandering" leader Kim Jong-il.

The South Korean government stopped official propaganda against the North in 2004, in line with a bilateral agreement. However, while discouraging activists from launching leaflets, the government has refused to take action against them, citing freedom of speech.