North Korea could launch an intercontinental missile test or even a nuclear test to try to overshadow U.S. President Joe Biden’s upcoming visit to South Korea, an expert told CNBC on Friday.

“They’ve already done two intercontinental ballistic missile tests earlier this year and we’ve been seeing tunneling activity preparing for a nuclear test,” Bruce Klingner, senior research fellow at The Heritage Foundation, told CNBC’s “Street Signs Asia” on Friday.

He added that such a test would be intended to “overshadow” Biden’s trip.