South Korea scrambled its jets to shoot down five North Korean drones after they crossed into its airspace on Monday.

South Korea's military fired about 100 shots but failed to shoot any down. 

A South Korean official told a media briefing in Seoul today that this is a clear act of provocation by the North violating our airspace.

The official said one of the five drones flew near the capital, Seoul, and the others flew near the west coast.

He said South Korea initially fired "warning shots" when it first detected the drones.