| Headquarters Mobile Support Unit | |
|---|---|
 | |
| Active | 1980[1] - Present |
| Agency | Police Service of Northern Ireland |
| Type | Police tactical unit |
| Role | Counter-terrorism Law enforcement |
| Operations jurisdiction | Northern Ireland |
| Part of | Specialist Operations Branch (C4)[2] |
| Abbreviation | HMSU |
The Headquarters Mobile Support Unit (HMSU) is the police tactical unit of the Police Service of Northern Ireland (PSNI). The HMSU was originally formed in the then Royal Ulster Constabulary (RUC) part of RUC Special Branch and was involved in several controversial shootings during The Troubles.
- ^ Police Federation for Northern Ireland. "Benevolent Fund Benefits From HMSU Charity Drive". Policebeat: The News Magazine of the Police Federation for Northern Ireland (February 2011): 15. Archived from the original on 4 June 2017.
- ^ "PSNI Policy for Special Operations Branch - Policy Directive 04/07" (PDF). Police Service of Northern Ireland. Archived from the original (PDF) on 19 September 2010.