President Halimah Yacob and Prime Minister Lee Hsien Loong have written letters to Indonesian President Joko Widodo to congratulate him on his re-election in last month's polls.

In a letter released by the Ministry of Foreign Affairs yesterday, Madam Halimah said Mr Joko's convincing victory was a testament to the trust and confidence that the Indonesian people had in his leadership.

"I am certain that you will build on the strong foundations of your first term to create a better future for all Indonesians," she said.

She noted that Singapore and Indonesia have excellent relations that are built on mutual respect and cooperation, with people-to-people ties that are deep and growing.

"I am confident that the ties between our two countries will continue to strengthen in the years ahead," she added, as she wished him success in his second term in office.

Congratulating Mr Joko on his victory, PM Lee said: "The strong mandate you received reflects the trust that Indonesians have demonstrated in your continued leadership, and your vision to uplift the lives of all Indonesians."

He noted that Singapore and Indonesia had made significant progress during Mr Joko's first term, including jointly launching the Kendal Industrial Park in 2016, and commemorating 50 years of bilateral relations in 2017.

He said both countries cooperated closely in many areas, including trade and investment, the digital economy, skills upgrading, tourism, and defence and security, while bilateral relations were in excellent shape.

PM Lee said he looked forward to working closely with Mr Joko to build on what both countries have achieved and to explore new opportunities for cooperation. He added that he hoped to meet Mr Joko at the Asean Summit in Bangkok next month.

PM Lee said he and his wife Ho Ching also wished Mr Joko and his wife Iriana good health and success.