The United States “would not be surprised” if North Korea conducted another nuclear test after it launched an intercontinental ballistic missile this week, White House national security adviser Jake Sullivan said today.

“I have been concerned for some time that North Korea will conduct its seventh nuclear test,” Sullivan said in an interview broadcast by the CBS television network. “I don’t see any indication that this will happen soon,” he added. “But it wouldn’t be a surprise if North Korea went ahead with another nuclear test,” he said, noting that Pyongyang has been developing its intercontinental ballistic missile capabilities for years and “will continue to do so.”

North Korea announced on Thursday that it had successfully test-fired its new solid-fuel intercontinental ballistic missile under the supervision of its leader, Kim Jong Un. The Hwasong-18 missile covered a distance of 1,001 kilometers, reaching a height of 6,648 meters, before falling into the East Sea, North Korea’s KCNA news agency reported, using the Korean name for the Sea of ​​Japan.

The UN, the US and their allies have condemned the launch, which violates UN Security Council resolutions. Sullivan said today, however, that Washington is “ready to sit down and discuss without conditions the nuclear program” of North Korea.