The Trump administration is considering putting North Korea back on the United States’ list of state sponsors of terrorism, national security adviser H.R. McMaster told reporters Thursday.

“That is an option that is under consideration,” McMaster said at the White House briefing. “And so the president’s cabinet is looking at this as part of the overall strategy on North Korea.”

McMaster made the comments as President Trump prepares to embark on a foreign trip to five Asian countries over the next week, including South Korea, amid esclating nuclear tensions with North Korea.

“A regime who murders someone in a public airport using nerve agents and a despotic leader who murders his brother in that matter, that’s clearly an act of terrorism that fits in with the range of other actions,” he said.