Relations between North and South Korea have become "completely frozen" because of Seoul's choice to go along with U.S. sanctions policy on the DPRK, one of South Korean President Moon Jae-in's top advisors said in Washington on Monday.

The advisor, Moon Chung-in, blamed sanctions for getting in the way of Seoul's plans to create a so-called "peace economy," which the Moon administration claims would integrate the two Koreas' economies and bring the two countries closer together, thereby leading to peace.