The South Korean navy fired warning shots Friday to end a brief incursion by a North Korean patrol boat across the sensitive maritime border, AFP reported.

The South Korean navy fired warning shots Friday to end a brief incursion by a North Korean patrol boat across the sensitive maritime border, AFP reported.

 The patrol boat came around 900 meters inside the South’s side of the disputed Yellow Sea border shortly after midday (03:00 GMT), Seoul's Defense Ministry said.

 “One of our naval vessels gave a verbal warning by loudspeaker and then fired six warning rounds,” a spokesman said.

The North Korean ship returned across the border minutes later. It was the first such boundary violation in four months, according to Seoul.