这些照片是在上周六上午9点05分拍的，就在抢劫发生半小时前。
The pictures are timed at 9:05 am last Saturday, just half an hour before the robbery occurred.
有关官员表示，这两名男子在上周五晚上到周六上午之间的某个时间，使用电动工具洞穿了监狱围墙。
Officials say the men used electric-powered tools to cut through the prison walls sometime between late Friday and early Saturday.
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