Former Bosnian Serb leader Radovan Karadzicwill begin his defence against charges of war crimes at The Hague.
He faces 10 charges including genocide, war crimes and crimes against humanity. He has denied the charges, which relate to the Bosnian war of the 1990s. Karadzic could face a maximum sentence of life in prison if convicted.
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It comes after security was stepped up around the country following the Manchester Arena attack which killed 22 people.
A murderer nicknamed 'Houdini' after escaping the death penalty seven times has been given the lethal injection.
The distress signal sparked a police hunt in the area to find the person or group who made it.