U.S. President Donald Trump said Wednesday that North Korea has returned the remains of around 200 U.S. troops who went missing in the Korean War in the 1950s.

Trump revealed the return of the remains during a rally in Duluth, Minnesota. U.S. authorities have not made any official announcement on the matter.

U.S. officials told Reuters news agency, on condition of anonymity, North Korea would hand over a "sizable number" of remains to U.N. Command in South Korea and they would be transferred to Hickam Air Force Base in Hawaii.

North Korean leader Kim Jong Un agreed to the return of the remains of U.S. soldiers at his summit with Trump in Singapore earlier in the month.

More than 7,800 Americans remain unaccounted for from the 1950-1953 war, according to the U.S. government.