flying squad:
(plural: a group name for members of a special unit — ‘flying squads‘)

a Flying Squad officer in action
(old usage and always with capital ‘F’ and ‘S’ — Flying Squad) a branch of London’s Police Force;
a group of special officers, especially the police, who is always ready for quick action anticipating any serious crimes;
a group of special officers with special powers, acting as a group of normal people in ordinary clothes, that can move fast and can visit suspected places of danger or crime without prior or formal notice or warning to check for illegal activities, and can make arrests in order to stop any possible future crime;
a team very athletic players,

the Elephant Flying Squad on patrol (video 2 on the right of this text)
As he had been an ace police officer with right attitude and knowledge in law and order, Jimmy was promoted to head a unit of Flying Squad that is assigned to curb armed robberies.
A flying squad has special power and unlimited access to any place at any time, and can question or detain anybody showing reasonable cause and evidence.
The concept of organising a flying squad is so practical that most of the government departments have their own flying squads to control malpractices involving outsiders or their own staff.
The contribution of Elephant Flying Squad organised by World Wildlife Fund has been so great that several other animal-loving organisations have organised such ‘flying squads’ for different purposes.
