A court in İstanbul ruled on Friday for the arrest of Orhan Erdemli, a lawyer representing US-based Turkish scholar Fethullah Gülen, who is accused by Turkish authorities of being behind a failed coup last July.

A penal judge of peace at the İstanbul Courthouse decided to arrest Erdemli on charges of “being an executive of a terrorist organization.”

Erdemli was detained in İstanbul on Feb. 22.