In Singapore, law enforcement is principally led by the Singapore Police Force (SPF), and supported by other agencies including the Singapore Prison Service, Central Narcotics Bureau, Corrupt Practices Investigation Bureau, Internal Security Department, Immigration and Checkpoints Authority, and Singapore Customs. Furthermore, some law enforcement powers may be exercised by non-government entities such as auxiliary police forces and security officers. Singapore's law enforcement system has resulted in crime being extremely low as compared to other developed nations and the world in general. According to the Economist Intelligence Unit (EIU) Safe Cities Index, Singapore was often ranked as the safest or one of the safest in the world, especially in regards to digital, personal and infrastructure security. The country also ranks highly on the Global Peace Index, being consistently placed in the top 10 and the highest in Asia for the past decade. Foreign travel advisories for Singapore often state that petty crime such as pickpocketing and street theft as extremely rare in Singapore. Violent crime is also deemed extremely rare and almost non-existent. Threats of terrorism remain a major concern, as is the case with most developed countries. As a constant reminder from consulars to possible drug traffickers, penalties for drug offences such as trafficking in Singapore remain severe and may include capital punishment. The Overseas Security Advisory Council (OSAC) of the United States Department of State states Singapore as being a very low-threat location for crime directed at or affecting "official U.S. government interests". The foreign advisory of the Ministry of Foreign Affairs of China also considers Singapore as a low-risk country. Governmental law enforcement and regulatory agencies Singapore Police Force The Singapore Police Force is the main government agency tasked with maintaining law and order in the city-state. It was founded in 1820, and is under the supervision of the Ministry of Home Affairs. Singapore Prison Service The Singapore Prison Service (SPS) was formed in 1946 and operates the prison system in Singapore, under the supervision of the Ministry of Home Affairs. Under the Prisons Act 1933, a prisons officer has the powers of the police officer (Section 32), and may be armed (Section 31). Corrupt Practices Investigation Bureau The Corrupt Practices Investigation Bureau (CPIB) is a government agency in Singapore which investigates and prosecutes corruption in the public and private sectors. It was founded in 1952. Although the primary function is to investigate corruption, it is empowered to