Egyptian security officials say an Islamic State suicide bomber has killed four members of a local tribe and wounded others in the northern Sinai Peninsula.
They say the attacker, driving a car filled with explosives, struck a checkpoint near the town of Rafah manned by members of the powerful Tarabeen tribe.
The army has been battling a so-called Islamic State affiliate in northern Sinai since 2014.
Last week, clashes erupted between the militants and local tribes after I.S. fighters shot at a truck smuggling cigarettes into an area where the extremists have banned tobacco.