A Turkish court in capital Ankara handed down aggravated life sentences to 18 members of the Fetullah Terrorist Organization (FETO), said a judicial source Monday.

The court said they were guilty of martyring senior staff sergeant Omer Halisdemir during the 2016 defeated coup bid in Turkey.

Omer Halisdemir

They were sentenced on the counts of intentional murder and attempt to overthrow the constitutional order.

Later during the day, the sentences of 13 convicts were reduced to life sentences through discretionary mitigation, the source added.

Halisdemir — who was martyred during the defeated coup attempt night after he shot dead

Read more: Turkish court sentences 18 FETO members to life