The North Korean and Singaporean foreign ministers have had "in-depth" discussions ahead of next week's summit between Pyongyang and Washington, North Korean media said Friday.

The Korean Central News Agency did not provide details of their exchange, but the officials appear to have made final arrangements for the historic meeting between North Korean leader Kim Jong Un and U.S. President Donald Trump in Singapore on Tuesday.

The meeting between Singapore's Foreign Minister Vivian Balakrishnan and his North Korean counterpart Ri Yong Ho was held Thursday after the former arrived in Pyongyang earlier in the day.

On Friday, Balakrishnan also met with North Korea's nominal head of state Kim Yong Nam, KCNA said.

Balakrishnan on the same day visited Mangyongdae, the birthplace of Kim Jong Un's grandfather and North Korea's founder Kim Il Sung, and the Tower of the Juche Idea, a monumental stone column named after Pyongyang's official ideology, the news agency said.

It was the first time since 2008 for a Singaporean foreign minister to visit North Korea, according to the Tokyo-based Radio Press news agency.

North Korea's state-run media have yet to report that the Trump-Kim summit is scheduled to be held in Singapore.

Singapore has maintained diplomatic relations with North Korea for more than 40 years.

But in November, at a time when Pyongyang still clung to its defiant pursuit of nuclear and missile capabilities, the city-state suspended trade ties with North Korea in line with toughened sanctions imposed by the U.N. Security Council.

Singapore has been serving as a broker between North Korea and the United States, which have no diplomatic ties.