An explosion near a security checkpoint on a main road in Cairo killed six police officers and wounded three others Friday.
Cairo Blast Kills 6 Police Officers

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Detectives inspect the site of an explosion in Giza, Egypt, Dec. 9, 2016. (H. Elrasam/VOA)

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Egyptian police soldiers become emotional after losing friends and coworkers in an explosion in Giza, Egypt, Dec. 9, 2016. (H. Elrasam/VOA)

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Residents watch the inspection of the explosion in Giza, Egypt, Dec. 9, 2016. The explosion hit at 9:30 a.m., and then police blocked the road. (H. Elrasam/VOA)

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Paramedics wait at the explosion location in Giza, Egypt, Dec. 9, 2016. (H. Elrasam/VOA)