The Special Duties Unit (Abbreviation: SDU; Chinese: 特別任務連, nicknamed Flying Tigers 飛虎隊) is an elite paramilitary tactical unit of the Hong Kong Police Force. Established in July 1974, it is a sub-division of the Police Tactical Unit (PTU).[2] Its primary functions include counter-terrorism, hostage rescue and dealing with crimes (usually involving firearms) which are considered too dangerous for regular police to handle. The unit was formerly trained by the British SAS before the handover of Hong Kong to China.
The Special Duties Unit is based in Fanling where the Police Tactical Unit is also based.