SEOUL, South Korea (AP) North Korea flew hundreds of balloons carrying trash and manure toward South Korea in one of its most bizarre provocations against its rival in years, prompting the Souths military to mobilize chemical and explosive response teams to recover objects and debris in different parts of the country.

The ballooning campaign came as North Korean leader Kim Jong Un urged his military scientists to overcome a failed satellite launch and continue developing space-based reconnaissance capabilities, which he described as crucial for countering U.S. and South Korean military activities, state media said Wednesday.

In his first public comments about the launch failure, Kim also warned of unspecified stern action against South Korea over an exercise involving 20 fighter jets near the inter-Korean border hours before North Koreas failed launch on Monday. In a speech Tuesday, Kim called the South Korean response hysterical insanity and a very dangerous provocation that cannot be ignored, the Norths official Korean Central News Agency said Wednesday.