Deputy Prime Minister Teo Chee Hean received a warm welcome from Thai leaders in Bangkok as the two sides sought to strengthen bilateral cooperation on security and other matters.
The Coordinating Minister for National Security yesterday met Thailand's Prime Minister Prayut Chan-o-cha, Deputy Prime Minister Prawit Wongsuwan and Interior Minister Anupong Paochinda.
Mr Prayut is also due to visit Singapore on Friday to speak at the IISS Shangri-La Dialogue, an annual forum for key policymakers in the areas of defence and security.
In his meetings with Thai leaders, Mr Teo discussed cooperation on anti-terrorism and security, including cyber security.
Both sides welcomed greater defence cooperation, both bilaterally and through regional and multinational platforms, said the Ministry of Foreign Affairs in a statement.
Earlier in the morning, Mr Teo also had a discussion with Privy Council president Prem Tinsulanonda.
In the evening, he was hosted to dinner by Princess Maha Chakri Sirindhorn at Sra Pathum Palace.
Singapore and Thailand enjoy close ties. Singapore troops train in Thailand, while Singapore takes part in regular Thailand-hosted military exercises like Cope Tiger and Cobra Gold, which is the largest of its kind in the Asia-Pacific region. Trade between the two sides hit about US$30 billion (S$41 billion) last year.
Mr Teo, who was on a two-day visit, was accompanied by Mr Vikram Nair, chairman of the Government Parliamentary Committee on Defence and Foreign Affairs, and officials from the Foreign Ministry, Defence Ministry and national security coordination secretariat.
The group returned to Singapore last night.