The increase to $25 million reflects "the gravity of his crimes and the continued threat he poses," a senior official said.

Venezuelan strongman Nicolás Maduro began a third term as president on Friday, cementing his increasingly authoritarian rule.

Venezuelan President Nicolas Maduro, whose nearly 12 years in office have been marked by deep economic and social crisis, was sworn in for a third term on Friday, despite a six-month-long election dispute,