**Turkish authorities have detained a further 18 people over an alleged plot to create chaos and trigger a military coup, local media say.**The suspects, 17 of whom are military officers on active duty, were rounded up in a nationwide operation, CNN-Turk and Haber-Turk TV channels said.
Another 49 officers were detained on Monday, 31 of whom have been charged.
The case has increased tension between Turkey’s military and its Islamist-rooted ruling party.
News of the arrests came shortly after Turkish Prime Minister Recep Tayyip Erdogan vowed that conspirators would face justice.
“No one is above the law, no one has impunity,” he told a gathering of his Justice and Development Party (AKP).
Turkey’s military has overthrown or forced the resignation of four governments since 1960 - most recently in 1997 - though the current head of the armed forces has insisted that coups are a thing of the past.