North Korea's military staged a "large-scale artillery drill" in the country's east Tuesday to mark the founding of the country's army.
A statement from the South Korean military said the live-fire exercises were underway in the Wonsan region on Tuesday afternoon,butgave no details on what kinds of weapons and military units took part in the drill.
"Our military is closely monitoring the North Korean military's movements and remains firmly prepared," the statement from the South Korean Joint Chiefs of Staff says.
North Korea's drills coincided with military exercises held by US and South Korean navies in the Yellow Sea, off the western coast of the Korean Peninsula.Earlier Tuesday, a US submarine made a port call in South Korea in what US officials said was a show of force amid mounting tensions in the region.
The drills were held as the country commemorated the 85th anniversary of the founding of North Korean army, a significant date in the country's calendar.
A CNN team in North Korea said citizens in the streets of Pyongyang were celebrating Armed Forces Day, with no visible signs of tension.
In a statement after the artillery drills were confirmed, the South Korean President's Office said an emergency meeting had been held to discuss the situation.
Separately, envoys from South Korea, Japan and the US have been meeting in Tokyo to discuss North Korea's refusal to abandon its nuclear program.(Source: CNN)