El-Nashar was detained July 14 in Cairo after Britain notified Egyptian authorities that it suspected he may have had links to some of the attackers.
Britain detained an Egyptian citizen 
Doesn't specifically state if he is a citizen of Egypt
( z1 detain :ARG0 ( z2 country :name ( z3 name :op "Britain" ) ) :ARG1 ( z4 citizen :mod ( z5 country :name ( z6 name :op "Egypt" ) ) ) )