Singapore authorities arrested a man on his return to the city-state on Wednesday after he was jailed for spying for China in the US, saying they would investigate whether he posed a security risk.
Dickson Yeo, a Singapore citizen, returned to Singapore after serving prison time in the United States for acting as an illegal agent of Chinese intelligence.
The Internal Security Department (ISD) will interview Yeo to establish if he had engaged in activities prejudicial to Singapore's security, it said in a statement.
"Singapore will not allow our nationals to be subverted or used by any foreign actors for activities prejudicial to our security and national interests," the ISD said.
"The government takes a very serious view of any Singaporean who enters into a clandestine relationship with a foreign government and engages in espionage or subversive activities at the behest of the foreign power," it said, adding such individuals will be dealt in accordance with local laws.
Cardinals are scheduled to meet on Tuesday to plan Pope Francis' funeral, which leaders from around the world will attend ahead of a conclave next month to elect a new head of the Roman Catholic Church.
Russian President Vladimir Putin proposed on Monday bilateral talks with Ukraine for the first time since the early days of the war, and his Ukrainian counterpart Volodymyr Zelenskyy said Kyiv was eager to discuss a halt to attacks on civilian targets.
Ukraine issued air raid alerts for Kyiv and the country's eastern half as blasts shook the city of Mykolaiv early on Monday, authorities said, hours after the one-day Easter ceasefire declared by Russian President Vladimir Putin came to an end.
US Vice President JD Vance began a four-day visit to India on Monday and will hold talks with Prime Minister Narendra Modi, as New Delhi rushes to avoid steep US tariffs with an early trade deal and boost ties with the Trump administration.