An American citizen who disappeared in China might have been captured by North Korean security officials, according to a pair of Republican lawmakers.

Utah Sen. Mike Lee and Rep. Chris Stewart want President Trump to be apprised of the case in the run-up to his meeting with newly elected South Korean President Moon Jae-in. The South Korean leader is interested in engaging with North Korea and China following years of escalating tension on the peninsula under the leadership of a U.S.-friendly president who was undone by a corruption scandal.