Turkey's elite presidential guard is to be disbanded after nearly 300 of its members were detained following last week's failed coup.
Prime Minister Binali Yildirim told a TV channel that there was "no need" for the regiment.
Earlier, Turkey detained a nephew of US-based cleric Fethullah Gulen who it says was behind the uprising. He strongly denies the claim.
A key aide of Mr Gulen has also been arrested, a presidency official said.
President Recep Tayyip Erdogan has launched a widespread crackdown following the attempted coup, arresting thousands of service personnel and sacking or suspending thousands of government officials, school teachers and university heads.
A state of emergency was declared on Wednesday, allowing the president and cabinet to bypass parliament when drafting new laws and to restrict or suspend rights and freedoms.
"There will no longer be a presidential guard, there is no purpose, there is no need," Mr Yildirim told the A Haber TV channel.
The presidential guard numbers up to 2,500 soldiers but at least 283 were detained after the uprising.
Fethullah Gulen, who was once an ally of Mr Erdogan but then fell out with him, has called on the US government to block Turkey's attempts to extradite him.
The Anadolu news agency said Mr Gulen's nephew, Muhammet Sait Gulen, was detained in the north-eastern city of Erzurum and was being taken to the capital Ankara for questioning.
A presidency official quoted by Reuters said Halis Hanci, described as Fethullah Gulen's right-hand man, had been "captured".
The official said Mr Hanci had apparently entered Turkey two days before the coup attempt.
Earlier on Saturday, Mr Erdogan extended the period in which suspects can be detained without charge to 30 days.
A statement carried by state media also ordered the closure of more than 1,000 private schools and more than 1,200 associations.