Police have been told not to travel to work in their uniform after a threat to kidnap and murder an officer sparked a major security alert.
Counter terrorism detectives are probing the anonymous threat that was made to West Midlands Police.
The force called officers and staff in to special briefings overnight and security measures stepped up after they received the tip-off.
Bosses issued them with advice on travelling to and from work in partial uniform as well as being extra vigilant on patrol
The investigation, being lead by West Midlands Counter Terrorism Unit, was described as ‘fast-moving and dynamic.’