DPRK leader Kim Jong Un will arrive in Vietnam on February 25 ahead of a planned second summit with U.S. President Donald Trump, three sources with direct knowledge of Kim's schedule told Reuters on Saturday.

Trump and Kim are due to meet in Hanoi on February 27 and 28 following their historic first meeting last June in Singapore. U.S. Secretary of State Mike Pompeo said on Thursday Washington aims to “get as far down the road as we can” at the summit.

Kim will meet with Vietnamese officials when he arrives in Hanoi, said the sources.

He will also visit the Vietnamese manufacturing base of Bac Ninh and the industrial port town of Hai Phong, one source said.

Vietnam's president and general secretary of the ruling Communist Party, Nguyen Phu Trong, will meet Kim ahead of a planned trip by Trong to neighboring Laos, one of the sources with direct knowledge told Reuters.

A Reuters witness saw Kim's close aide, Kim Chang Son, in Hanoi on Saturday visiting a government guesthouse and the Metropole and Melia hotels in the center of the capital.