The U.S. special representative for North Korea, Stephen Biegun, said on Monday that “diplomacy is still very much alive” with North Korea, reports Reuters.

But Biegun, speaking at a nuclear conference in Washington, said gaps remain between the two sides and North Korea must show it is fully committed to elimination of its nuclear weapons.

“It’s certainly our expectation that we will be able to continue our close engagement,” he said, while offering no specifics on when new talks might be held.

Biegun said the United States did not know whether Kim would decide to conduct a new missile launch. He said the Trump administration takes “very seriously” reports about new activity at North Korea’s Sohae rocket site and was monitoring the situation closely. But he cautioned against drawing any snap conclusions.