Armed police deployment is not a response to any alerts and aims to deter potential assailants and give immediate reaction in case of emergency, according to the BBC.
"Tragically, what we have seen in France and other areas that it's in the first hour that there is large numbers of casualties," Paul Brandon, Kent deputy chief constable, said.
Reportedly, the UK authorities are also set to boost security at London Southend Airport with armed patrols.
Over the past months, several European cities became targets of terrorists, as a wave of attacks rocked Europe, including a truck running over a crowd in France's Nice, a suicide bombing near an open-air music festival in Germany's Ansbach, and a hostage taking at a church in France's Saint-Etienne-du-Rouvray, Normandy, in which a priest was killed.
