South Korea has sent 17.8 billion won (US$16.7 million) in humanitarian aid to North Korea in 2013, a 26 percent increase from last year, despite the spike in cross-border tensions, the Seoul government said Sunday. In a report released by the Ministry of Unification, the total amount of aid sent to the communist country, including money donated to international organizations, represents a 26 percent increase from 14.1 billion won offered in 2012.