The Hong Kong Police Force (HKPF) is the primary law enforcement, investigation agency, and largest disciplined service under the Security Bureau of Hong Kong. It was established by the British Hong Kong government on 1 May 1844. The 'Royal' title was bestowed upon the HKPF for its efforts in quelling communist riots in 1967. The Royal Hong Kong Police Force (RHKP) reverted to its former name after the transfer of sovereignty of Hong Kong from the United Kingdom to People's Republic of China.