South Korea pledges to retaliate against North Korea over its launch of garbage-filled balloons over border

South Korea said Sunday it'll soon take "unbearable" retaliatory steps against North Korea over its launch of trash-carrying balloons across the border and other provocations.

In the past week, North Korea floated hundreds of huge balloons to dump rubbish on South Korea, simulated nuclear strikes against its neighbor and allegedly jammed GPS navigation signals in the South in an escalation of animosities between the rivals.

South Korea's national security director Chang Ho-jin said Sunday that top officials at an emergency meeting decided to take "unbearable" measures against North Korea in response to its recent series of provocative acts.