South Korea offered North Korea flood relief aid worth 5 billion won ($4.7 million) on Wednesday after the communist state reported dozens of casualties and thousands made homeless by torrential rain. Seoul's unification ministry said the offer of medicine and daily necessities was made through the South's Red Cross. If the North accepted it, talks would be held on shipping arrangements. The offer came amid signs of an easing of high cross-border tensions. Nuclear negotiators from the two Koreas held rare talks last month on the sidelines of a regional security meeting in Bali.