Islamic terrorism is defined as any terrorist act or campaign which is committed by individuals or terrorist organizations who openly proclaim Islamic motivations behind their acts. Although the highest numbers of incidents occur in Iraq, Afghanistan, Syria and Nigeria, Islamic terrorism has been on the rise all over the world, including the West.
A federal complaint charges Mercurio with attempting to provide material support or resources to a designated foreign terrorist organization.
Fellow host countries, Spain and England, also undertook additional security precautions this week after the Islamic State called on its followers to attack sporting venues across Europe.
The Popular Front for the Liberation of Palestine is no longer a sanctioned group in the UK, thanks to a Brexit loophole.
The terror attack, which is the worst Russia has seen in years, has led to the authority's torture of the terrorists prior to their court hearings, as Russia seeks to lay blame on Ukraine.
When asked if the assault represented an intelligence service failure, the Kremlin said that Russia's standoff with the West meant intelligence-sharing was not happening in the way it used to.
French officials were holding a meeting on Monday to look at specific measures to step up security, such as checking bags on entrance to concert halls or places of worship.
When we look at the attack on Russia and Israel, the similarities are clear when it comes to the methods of the terrorists and the victims
The al Qaeda-allied group has been fighting for nearly two decades, aiming to topple Somalia's central government and establish its own rule based on its strict interpretation of Islamic sharia law.
Putin vowed to punish those behind concert massacre.
The Gardai announced they would implement a review of the security situation at the embassy as a result of the increasing number of threats.