The fire exchange took place a day after North Korea reported its leader Kim Jong Un’s first public appearance in some 20 days.
The move is aimed at preventing a military assault on the rebel-held province.
It’s the first time since 1985 that Israel has downed a Syrian plane.
The ‘buffer zones’ meant anti-abortion protesters had to stay 35-feet from clinics.
Pyongyang says it will tear up the 1953 armistice in response to US attempts to pursue UN sanctions against it.
South Korean soldiers were reported to have collected thousands of leaflets floated by the North across the frontier as relations worsen between the two countries still technically at war.
The US president said there will be consequences if North Korea goes ahead with its plans to test a long-range rocket next month.