REPUBLIKA.CO.ID, SEOUL -- South Korea said Monday it was discussing the further deployment of US "strategic assets" following a flyover by a US B-52 bomber in response to North Korea's latest nuclear test.

Seoul also announced additional restrictions on the movement of its citizens to the jointly-run Kaesong industrial park, just a few kilometres (miles) over the border inside North Korea.

The South has taken an uncompromising stance in the wake of Wednesday's test, urging the international community to impose harsh sanctions on Pyongyang, and resuming high-decibel propaganda broadcasts into North Korea.

In a show of strength on Sunday, a B-52 Stratofortress -- flanked by South Korean F-15 fighter jets and US F-16 planes -- flew over Osan Air Base, some 70 kilometres (45 miles) south of the inter-Korean border.

The US military said the fly-by was a demonstration of the "ironclad" commitment to its military alliance with South Korea, and a direct response to the North's fourth nuclear test.

"South Korea and the US are in close consultations about additional deployment of other strategic assets on the Korean Peninsula," Defence Ministry spokesman Kim Min-Seok told a regular press briefing in Seoul.

Ikuti Whatsapp Channel Republika