Russia is in close contact with the US, China and South Korea in relation to North Korea's request to consider evacuating its embassy staff, according to the Russian news agency RIA.
The report quotes the Russian foreign minister Sergei Lavrov.
Through her tears, a North Korean woman told me how she had to escape: risk death while running across the border or die of starvation.
Memories of the Korean war are never far away in South Korea, where residents have grown used to living with the constant threat of war.
North Korea said it will withdraw workers from the Kaesong factory park run jointly with South Korea and suspend all operations there.