The EU has praised the summit between US President Donald Trump and North Korean leader Kim Jong-un as a "crucial and necessary step", saying it indicated "complete denuclearisation" of the Korean peninsula could be achieved.
"This summit was a crucial and necessary step to build upon the positive developments achieved in inter-Korean relations and on the peninsula so far," the EU's diplomatic chief Federica Mogherini said in a statement.
The head of the UN's nuclear watchdog also welcomed the statement issued by Mr Trump and Mr Kim at the end of their summit.
"I welcome today's Joint Statement of President Trump of the United States and Chairman Kim of the DPRK at the Singapore Summit which includes the DPRK's commitment towards complete denuclearisation of the Korean Peninsula," Yukiya Amano, director general of the International Atomic Energy Agency, said in a statement.
"The IAEA stands ready to undertake any verification activities in the DPRK that it may be requested to conduct by the countries concerned," the statement adds.
Meanwhile, Russian Foreign Minister Sergei Lavrov approved of the meeting in Singapore, Interfax reported.
"The mere fact of the meeting between the leaders of the United States and North Korea is positive ... We are following the comments that both sides are making but we have not seen the document yet, we'll see," Mr Lavrov was quoted as saying.