Turkey's chief prosecutor has issued an arrest warrant for former CIA officer Graham Fuller.
The prosecutor accuses Mr Fuller, former vice-chair of the US National Intelligence Council, of having links to Muslim cleric Fethullah Gulen.
Mr Gulen, who lives in the US, is blamed by Turkey for last year's failed coup attempt. He denies the claim.
The warrant also accuses Mr Fuller of "attempting to overthrow" Turkey's government, the Hurriyet daily reports.
More than 50,000 people have been arrested in Turkey pending trial over links to Mr Gulen.
Another 150,000 people have been sacked or suspended from jobs in the public and private sectors since the coup attempt on 15 July 2016.