Flash: North Korea has placed 122mm self-propelled howitzers in an open area on Kapong Beach, about 1.5km from South Korea's Aegibong Observatory in Gimpo, with their barrels pointing south.
The armor bears the slogan "Destroy the US imperialist aggressors".
North Korean soldiers were seen nearby drilling with red flags, as well as armored vehicles and fence construction work.
North Korea usually hides its artillery in reverse slopes or bunkers.
South Korean analysts argue that his clear presentation is a deliberate show of force rather than a normal tactical deployment.