BEIJING — U.S. Secretary of State Rex Tillerson acknowledged on Saturday that the United State is maintaining direct channels of communications with North Korea even as tensions rise over the North’s nuclear and missile programs and the countries’ leaders spar through bellicose name-calling.Tillerson said the U.S. was probing North Korea’s willingness to talk, and called for a calming of the situation on the Korean Peninsula, adding it was incumbent on the North to halt the missile launches.“We have lines of communication to Pyongyang. We’re not in a dark situation, a blackout,” Tillerson told reporters during a visit to China. “We have a couple … three channels open to Pyongyang. We can talk to them, we do talk to them.”No elaboration about those channels or the substance of any discussions came from Tillerson, who met with Chinese President Xi Jinping and other top officials in Beijing.While Tillerson affirmed that the U.S. would not recognize North Korea as a nuclear power, he also said the Trump administration had no intention of trying to oust Kim. “Despite assurances that the United States is not interested in promoting the collapse of the current regime, pursuing regime change, accelerating reunification of the peninsula or mobilizing forces north of the DMZ, North Korean officials have shown no indication that they are interested in or are ready for talks regarding denuclearization,” U.S. State Department spokeswoman Heather Nauert said in a statement.