The aircraft carrier USS Enterprise arrived in South Korea Tuesday for a routine port call, officials said, amid heightened tensions in the region over North Korea's missile launches.

The Carrier Strike Group 12 led by the world's first nuclear-powered aircraft carrier arrived at the southern port of Busan, the U.S. Navy in South Korea said in a statement.

The vessel's visit "has been previously scheduled and it is not in response to any specific event," the statement said.

CountryWatch: North Korea

The communist North fired seven missiles earlier this month, including one believed capable of reaching the United States.

The missiles plunged into the sea east of the Korean Peninsula without causing any known damage or injuries, but prompted strong international condemnation.

It wasn't clear how long the vessel would stay at the port.

It is the first time in 17 years for the Norfolk, Va.-based Enterprise to travel to Pacific waters.

The carrier's deployment to the Asia-Pacific region is "part of a regular rotation of vessels in support of U.S. commitments to around the world," the Navy said.

About 29,500 U.S. troops are stationed in South Korea, which remains technically at war with the communist North since the 1950-53 Korean War ended in a cease-fire, not a peace treaty.