A self-proclaimed al-Qaeda militant who seized four people in a bank in Toulouse, France, has released one of the hostages, French police have told the BBC.
Officials said the man demanded money from the bank but when they refused, he fired a shot and hostages were taken.
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Mladic, now 75, was the military commander of Bosnian Serb forces in the 1990s, who fought against the Bosnian Croat and Bosniak armies.
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His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."