Special Forces join police to launch UK's biggest security operation to prevent Paris-style attack

In the wake of the terror attack on French satirical magazine, Charlie Hebdo, elite Special Forces have joined counter-terror police and 1,900 Army personnel to launch the United Kingdom's biggest security operation since the 2012 London Olympics, a report said.

While some Special Forces personnel will don police uniforms to accompany police officers who visit the homes of "persons of interest" in response to the intelligence provided by MI5, most of the officers will be dressed in civilian clothes, reported The Daily Express.

The report said that a 30-strong Special Air Service (SAS) team, divided into smaller groups, has been allocated to the Police Counter Intelligence Unit by the regiment's inner sanctum, dubbed the Kremlin. Also, an entire squadron of SAS soldiers has been put on permanent standby to react to any incident in the UK.

The news comes as Al Qaeda warned that France was only its third preferred target after Britain and the United States after the Charlie Hebdo attack.

Ten journalists and two police were killed when two masked gunmen opened fire at the magazine's headquarters in Paris.