In various cities across the world, people gather to mourn those killed in the attacks on France's capital. Natasha Howitt reports.
As Paris mourns those killed in deadly attacks claimed by Islamic State, cities around the world join in. In the immediate aftermath, national leaders expressed their condolences - from Barack Obama to Vladimir Putin, and across Europe and the Middle East. But as news of the tragedy sinks in, expressions of solidarity have grown louder and clearer. Iconic landmarks have been lit up by the colours of the French flag, and large numbers of people around the world have gathered for candlelight vigils. Gunmen and bombers left at least 129 people dead in Paris in what President Francois Hollande has called an "act of war". They were the deadliest attacks in Europe since the 2004 Madrid bombings, and the worst bloodshed on French soil since the end of World War Two. They lay bare Islamic State's capability to strike at the heart of Europe, and highlight the difficulty of monitoring movements of militants intent on killing. The execution of the attacks has been described as a "nightmare" scenario for police forces - it involved several well-planned attacks with advanced weaponry on unarmed civilians across a densely populated capital.