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A child's backpack lies on the ground as members of a Thai bomb squad inspect the site of a motocycle blast in front of a school by suspected separatist militants in the Takbai district of Thailand's restive southern province of Narathiwat on September 6, 2016. A four-year-old girl was among two people killed after a bomb hidden in a motorcycle was detonated outside a school in Thailand's insurgency-plagued south, authorities said. The device, packed in the fuel tank of the parked motorcycle, struck as pupils and teachers filed into the school in Tak Bai district of Narathiwat province for the start of the day. / AFP / MADAREE TOHLALA (Photo credit should read MADAREE TOHLALA/AFP/Getty Images)

A child's backpack lies on the ground as members of a Thai bomb squad inspect the site of a motocycle blast in front of a school by suspected separatist militants in the Takbai district of Thailand's restive southern province of Narathiwat on September 6, 2016. 
A four-year-old girl was among two people killed after a bomb hidden in a motorcycle was detonated outside a school in Thailand's insurgency-plagued south, authorities said. The device, packed in the fuel tank of the parked motorcycle, struck as pupils and teachers filed into the school in Tak Bai district of Narathiwat province for the start of the day. / AFP / MADAREE TOHLALA        (Photo credit should read MADAREE TOHLALA/AFP/Getty Images)