Akif Mustafa Kocyigit is suspected of having links to Friday's deadly coup attempt, sources from the prime ministry said on condition of anonymity.

Kocyigit had reportedly been demoted to a lower status at the prime ministry because he was a suspected member of FETO, headed by the U.S.-based cleric Fetullah Gulen. 

The Turkish government said the Gulenist Terror Organization or Parallel State Structure (FETO/PDY) is behind the failed coup, which aimed to overthrow country's democratically elected government.

So far, 257 people have been suspended from their duties at the prime ministry for alleged links to FETO.

Anadolu Agency