Sri Lankan Prime Minister Ranil Wickremesinghe told Sky News on Thursday that the Sri Lankan government had known Sri Lankan nationals who had joined Islamic State (IS) had returned to the country – but that they could not be arrested, since joining a foreign terrorist organisation is not against the law. His comments came days after attacks on Easter Sunday that killed 253 people – revised down from more than 350. IS claimed responsibility on Tuesday, although the degree of their involvement is unclear. “We knew they went to Syria … But [in] our country, to go abroad and return or to take part in a foreign armed uprising is not an offence here,” Wickremesinghe said. “We have no laws which enable us to take into custody people who join foreign terrorist groups. We can take those who are, who belong to terrorist groups operating in Sri Lanka.” Sri Lanka has anti-terrorism legislation – its Prevention of Terrorism Act of 1978 has been criticised by Amnesty International and Human Rights Watch. The law allows for “arrests for unspecified ‘unlawful activities’ without warrant, and permits detention for up to 18 months without the authorities producing the suspect before a court pretrial,” as Human Rights Watch put it in a 2018 report. Some say the law allows for targeting and detention of the Tamil minority; the civil war that waged for nearly three decades was fought between the state and the Liberation Tigers of Tamil Eelam, or Tamil Tigers. “They have been working on replacement legislation called the Counter-Terrorism Act, which is designed to be a) more rights-friendly and b) more responsive to current forms of threat, but the law remains in drafting stage, after numerous rounds of deliberations in government and parliament,” Sri Lanka analyst Alan Keenan of the International Crisis Group wrote in an email. While the prime minister may be making as much a political case as a legal one, the pre-existing anti-terrorism law in Sri Lanka was written in, and for, a different time. Many countries amended their relevant legislation after 2014, the year that Islamic State declared a caliphate. In 2014, Australia approved its Counter-Terrorism Legislation Amendment (Foreign Fighters) Bill, which made new offences of “advocating terrorism” and “of entering or remaining in a ‘declared area’ of a foreign country in which a terrorist organisation is engaging in hostile activity.” That same year, Ireland proposed a Criminal Justice (Terrorist Offences) (Amendment) Act, which made it an offence to, among other things, recruit and train for terrorism. The bill is now law. “Even for countries that have criminalised membership in foreign militant groups or other terror offences abroad, it can be difficult to collect enough useful evidence from a foreign battlefield to meet a prosecutorial standard,” Sam Heller, senior analyst of non-state armed groups at Crisis Group, wrote in an email. “That’s why countries like Australia have passed ‘declared areas’ legislation, which prohibit their nationals from visiting specific countries or areas such as Raqqa. So it’s not so easy – I think everyone’s trying to figure it out.” Sri Lanka is not alone in not having legislation that makes it illegal to join a foreign terrorist organisation. Last month, the Swedish government moved ahead with a proposal for legislation that would make it illegal to participate in or cooperate with a terrorist organisation. Sri Lanka blast death toll lowered by about 100 as some bodies were ‘double counted’ But the proposed legislation suffered a setback when the Council on Legislation suggested it is incompatible with Sweden’s constitutionally protected freedom of assembly. And so now local, state, and social services are working together to determine whether individuals have committed war crimes, because, under current Swedish law, a specific crime needs to be suspected before an investigation can be opened, a resource-intensive process. “Strained resources is part of why some countries are reluctant to have their foreign fighters return home,” Heller wrote.