North Korea marks attack anniversary with threat on South's president

SEOUL (Reuters) - North Korea marked on Friday the third anniversary of an artillery attack on a South Korean island with a vow to respond to what it called any similar provocation with a strike on the South Korean presidential compound.

North Korea fired scores of artillery shells at South Korea's Yeonpyeong island on November 23, 2010, killing four people including two civilians in one of the heaviest attacks on its neighbour since the Korean War ended in 1953.