The Islamic State group's Egypt wing claimed responsibility for a series of attacks that killed at least 27 people on Thursday in some of the worst anti-state violence in months, after commemorations around the anniversary of the 2011 uprising turned deadly this week.
Egypt's government faces an Islamist insurgency based in the Sinai Peninsula and growing discontent with what critics perceive as heavy handed security tactics.
A series of tweets from the Twitter account of the Sinai Province group claimed responsibility for each of the four attacks that took place in North Sinai and Suez provinces within hours of one another on Thursday night.