(Reuters) – Britain’s security services are monitoring thousands of terrorism suspects in London and are involved in operations on a daily basis, the capital’s mayor Boris Johnson said in an interview published on Saturday.
“In London we’re very, very vigilant and very, very concerned,” mayor Johnson told the Daily Telegraph newspaper.
In August, Britain raised its international threat level to the second-highest classification of “severe”, meaning an attack was considered highly likely, with Prime Minister David Cameron warning that Islamic State (IS) militants fighting in Syria and Iraq posed the country’s greatest ever security risk.
About 500 Britons are believed to have joined the fighting in the region and the authorities have long argued that radicalized, battle-hardened veterans would pose a grave threat on their return.
However, Johnson suggested the danger was more widespread.
“Every day – as you saw recently, we had to raise the threat level – every day the security services are involved in thousands of operations,” Johnson told the paper.