SEOUL, Sept 29 (Reuters) - U.S. Vice President Kamala Harris said on Thursday she visited South Korea to reinforce the strength of the two countries' alliance, as she held a meeting with South Korean President Yoon Suk-yeol in Seoul.

Harris landed in the South Korean capital early on Thursday and is set to visit the Demilitarized Zone (DMZ) separating the Koreas, just hours after North Korea test-fired two short-range ballistic missiles.