The United States said that Macao authorities have unblocked funds in frozen North Korean accounts, and told Pyongyang it must now start shutting down a nuclear reactor days before a deadline.

The reclusive state has insisted it will only close the reactor, which supplies it with weapons-grade plutonium, once $25 million dollars in funds linked to North Korean interests and frozen since 2005 in Macau's Banco Delta Asia are freed.