WASHINGTON, May 10 (Xinhua) -- U.S. President Donald Trump invited newly-elected South Korean President Moon Jae-in to visit Washington at an early date and Moon accepted the invitation, the White House said Wednesday.

On Wednesday, Trump spoke with Moon to congratulate him and the South Korean people on "his great election victory and their peaceful, democratic transition of power," according to a White House statement.

The two leaders agreed to continue to strengthen the U.S.-South Korea alliance and to deepen the enduring friendship between the two countries.

Moon was sworn in as new South Korean President on Wednesday. In a televised inaugural speech, he said he will be on the move for peace on the Korean Peninsula, vowing to visit Pyongyang, capital of the Democratic People's Republic of Korea (DPRK), under right conditions.

The new South Korean leader also vowed to sincerely consult with the United States and China to resolve the issue on the U.S. Terminal High Altitude Area Defense (THAAD) missile defense system.

Parts of the U.S. missile interception system have been moved to the THAAD deployment site in the country's southeastern region, causing strong protests from anti-THAAD activists and residents.