Correctional emergency response team

A correctional emergency response team (abbreviated CERT or CRT) is a team of specially trained prison officers tasked with responding to disturbances, riots, cell extractions, mass searches, or other situations in prisons that are likely to involve uncooperative or violent prisoners.
Duties.
Possible duties of a CRT include transport of high risk inmates, extracting uncooperative prisoners from their cells, daily full cell searches and high profile security, barricaded persons, riots, mass arrest, high risk or high profile transport and hostages situations, as well as crowd control. In the United States, CRT organization and training requirements differ from state to state. A standard cell extraction team may consists of the following:
CRT officers are outfitted with extensive gear, including body armor, helmets, tactical gloves, handcuffs, leg shackles, and riot shields.
A CRT officer may also be outfitted with a less-than-lethal shotgun, taser, OC spray, or lethal weapons such as firearms.
A CRT officer may be outfitted with plain-clothes police uniforms and work as part of a "strong man team" in emergency rooms (Capital Health Emergency Facility in Trenton, NJ).
Hong Kong CERT.
With a size of around 152 part-time personnel, the special response unit of the Correctional Services Department was set under the organisation of the escort and support group. 
The Hong Kong CERT handles emergency and riots with Hong Kong's prison system. Members are equipped with less lethal weaponry such as pepper spray. Firearms are used as a last resort.