BUSAN, South Korea (AFP) — A United States aircraft carrier arrived in South Korea Friday for the first time in nearly five years, ahead of joint drills in a show of force aimed at the nuclear-armed North.

The nuclear-powered USS Ronald Reagan and vessels from its strike group docked in the southern port city of Busan, part of a push by Seoul and Washington to have more US strategic assets operating in the region.

South Korea's hawkish President Yoon Suk-yeol, who took office in May, has vowed to beef up joint military exercises with the US, after years of failed diplomacy with North Korea under his predecessor.

"The deployment of the carrier USS Ronald Reagan to Busan demonstrates the strength of the South Korea-US alliance," a South Korean defense ministry official told AFP.

The visit aims to "deter North Korea's nuclear and missile threats," the official added.

The US Navy said the USS Ronald Reagan is accompanied on the South Korea visit by two vessels from its strike group — the USS Chancellorsville, a guided-missile cruiser, and the USS Barry, a guided missile destroyer.

They will take part in joint drills of South Korea's east coast this month, the Yonhap news agency said, adding that the nuclear-powered submarine USS Annapolis is also expected to participate.

The carrier's visit comes after months of warnings from South Korean and US officials that North Korean leader Kim Jong Un is preparing to conduct another nuclear test.