The 2016 el Arish attack was a mortar attack by ISIS on March 20,
2016 in which thirteen Egyptian policemen and soldiers were killed at a security checkpoint in Sinai's Al-Arish.
According to the Egyptian Ministry of Interior,
the mortar attack targeted Al-Safa checkpoint and at least 13 police officers and soldiers died.
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Text from the Wikipedia article “2016 Arish attack”, available under CC BY-SA 4.0.