Turkey has issued a detention warrant for a second US consulate worker, Hurriyet newspaper reports. It comes after the arrest of another employee prompted the US to suspend visas for Turkish citizens.
The wife and child of the second employee are also being questioned by police.
It follows the arrest of Metin Topuz, a Turkish citizen who worked at the US general consulate in Istanbul. He is alleged to have ties to exiled Turkish cleric Fethullah Gulen, whom Ankara blames for a failed coup attempt last summer.
A court has ruled that Topuz will remain in custody while his alleged links to Gulen are investigated.
Topuz’s arrest prompted the US to suspend most visas for Turkish citizens. Ankara reciprocated in a tit-for-tat move.