Almost 7,400 police, soldiers, civil servants and academics have been dismissed from their posts in Turkey as the country marks one year since an attempted coup against Recep Tayyip Erdogan.

The ensuing crackdown has seen 150,000 public sector workers suspended and 50,000 people from the military, police, judiciary, education and press arrested on terror charges.

Most are accused of links with an organisation run by US-based Turkish cleric Fethullah Gulen, who denies government accusations of backing the coup attempt.

Purges have been implemented through decrees issued under the country’s ongoing state of emergency, with the latest announcing the dismissal of 2,303 police officers, 1,486 interior ministry staff, 546 navy and air force personnel, 418 justice ministry officials, 789 from the health ministry, 551 from religious affairs, 302 academics and 102 education ministry employees.

The former governor of Istanbul, Hüseyin Avni Mutlu was among those dismissed by the order, which also stripped 342 retired officers and soldiers of their ranks and grades.

It came on the eve of a series of events marking the one-year anniversary of the attempted coup and commemorating the lives of 250 people killed in the violence.

Mr Erdogan is set to unveil a large monument dedicated to “martyrs” opposite his palace in Ankara and another near Istanbul's former Bosporus Bridge, which has been renamed as the “July 15 Martyrs Bridge” to honour those who died resisting the coup.

In pictures: Turkey coup attempt Show all 17 1 /17 In pictures: Turkey coup attempt In pictures: Turkey coup attempt Turkish President Erdogan attends the funeral service for victims of the thwarted coup in Istanbul at Fatih mosque on July 17, 2016 in Istanbul, Turkey Burak Kara/Getty Images In pictures: Turkey coup attempt Soldiers involved in the coup attempt surrender on Bosphorus bridge with their hands raised in Istanbul on 16 July, 2016 Gokhan Tan/Getty In pictures: Turkey coup attempt A civilian beats a soldier after troops involved in the coup surrendered on the Bosphorus Bridge in Istanbul, Turkey, 16 July, 2016 REUTERS/Murad Sezer In pictures: Turkey coup attempt Surrendered Turkish soldiers who were involved in the coup are beaten by a civilian Reuters In pictures: Turkey coup attempt Soliders involved in the coup attempt surrender on Bosphorus bridge Getty In pictures: Turkey coup attempt Supporters of Turkish President Recep Tayyip Erdogan wave flags as they capture a Turkish Army vehicle Getty In pictures: Turkey coup attempt People pose near a tank after troops involved in the coup surrendered on the Bosphorus Bridge in Istanbul, Turkey, 16 July, 2016 Reuters In pictures: Turkey coup attempt Turkish soldiers block Istanbul's Bosphorus Brigde Getty In pictures: Turkey coup attempt A Turkish military stands guard near the Taksim Square in Istanbul Reuters In pictures: Turkey coup attempt Pierre Crom/Twitter In pictures: Turkey coup attempt Turkish soldiers secure the area as supporters of Recep Tayyip Erdogan protest in Istanbul's Taksim square AP In pictures: Turkey coup attempt People demonstrate in front of the Republic Monument at the Taksim Square in Istanbul Murad Sezer/Reuters In pictures: Turkey coup attempt Turkish soldiers detain police officers during a security shutdown of the Bosphorus Bridge Reuters In pictures: Turkey coup attempt Turkish Army armoured personnel carriers in the main streets of Istanbul Getty In pictures: Turkey coup attempt Chaos reigned in Istanbul as tanks drove through the streets EPA/TOLGA BOZOGLU In pictures: Turkey coup attempt Turkish President Tayyip Erdogan speaks to media in the resort town of Marmaris Reuters In pictures: Turkey coup attempt Supporters of President Erdogan celebrate in Ankara following the suppression of the attempted coup Reuters

The President is to deliver a speech in parliament at 2.32am local time on Sunday - the exact moment the assembly was attacked a year ago.

The rebellion unfolded on a Friday evening, when a group of military officers commandeered warplanes, helicopters and tanks to attack key government buildings in Ankara, including parliament and the presidential palace complex.

They held Istanbul's main bridge and square and tried to overtake television stations, while attempting capture or kill Mr Erdogan, who was on holiday at a Mediterranean resort at the time.

After CNN-Turk broadcast his call for citizens to take to the streets to stop the coup, rebelling soldiers were crushed by loyalist police and troops, as well as thousands of members of the public within hours.

More than 2,000 people were injured, in addition to the 250 killed, among them 53 special operations police killed in an attack on their headquarters.

Around 30 coup plotters are also believed to have died during their failed attempt to oust Mr Erdogan, who has been in power since 2003 as Prime Minister then President.

He went on to win a disputed referendum in April to turn Turkey from a parliamentary democracy to executive presidency, dramatically expanding his powers amid warnings over increasing authoritarianism.

His government has blamed the coup on the Gulenist network, which runs a network of schools, media outlets and universities around the world, with the crackdown extending to countries including Malaysia.

Mr Gulen's followers are accused of infiltrating state institutions over decades to carry out the insurgency but opponents of Mr Erdogan say the crackdown has widened to stifle any dissent.

Safak Pavey, a Turkish MP from the opposition Republican People’s Party, said so many political prisoners have been jailed since the coup that 38,000 inmates convicted of offences including rape, theft and fraud were released before finishing their sentences “to make room”.

Turkish Gendarmerie escort defendant, Akin Ozturk and others involved in last July's attempted coup in Turkey as they leave the prison where they are being held, ahead of their trial in Ankara (Getty Images)

Describing the conditions inside Turkey’s jails in a column for the New York Times, she said LGBT prisoners were kept in isolation under claims that they could “infect” others with Aids and syphilis, while at least 66 inmates killed themselves last year.

“Even the prison guards are afraid,” Ms Pavey wrote. “If you ask for a glass of water, they will not give it to you, to avoid accusations of being nice to the opposition.

“Inmates have no privacy, not even access to a private toilet…inmates are watched [by cameras] even as they sleep.”

Writing letters is forbidden, as is meeting in the prison yard and consultations with lawyers are limited to one hour a week, Ms Pavey said, adding: “Inmates have the right to 10 books a week, but they get a book a month. I heard an inmate being told: ‘The book is not available, but the author is here if you are interested’.”

Human Rights Watch and Amnesty International have reported torture and ill treatment of prisoners, who are allegedly beaten, made to kneel and deprived of sleep until they sign confessions.

UN experts have called on the Turkish government to immediately release lawyers and activists including Taner Kiliç, the chair of Amnesty International Turkey.

“The arrest of these human rights defenders, including prominent figures, is a further illustration of the witch-hunt taking place in Turkey,” they said in a joint statement published by the Office of the High Commissioner for Human Rights.

“The Turkish authorities are constantly citing security considerations, in particular the fight against terrorism and the need to avoid another attempted coup, to justify targeting dissent and criticism.

“This is having the effect of curtailing people’s rights to freedom of expression, assembly and association, and is particularly alarming.

“We have raised the alarm over the critical situation of fundamental freedoms in Turkey on various occasions and all the signs show that it is only going to escalate.”

CCTV shows Turkish school principal being 'abducted'

Mr Erdogan once described the coup as a “gift from God” that had allowed the government to purge the military and public institutions of the Gulenists who once were allied with his Islamic-rooted Justice and Development Party.

“No state can work with those who don't show it loyalty,” Prime Minister Binali Yildirim said this week.

“Our struggle [against Gulen's movement] will continue with determination.”

Mr Gulen, 79, has denied any involvement with the coup but admitted some of his followers may have been involved, while the British and German governments are among those finding no evidence to support Ankara’s claims or its designation of the Gulenist movement as a terror group.

Barack Obama refused requests to extradite Mr Gulen – once an ally of Mr Erdogan – from his home in Pennsylvania but there are fears Donald Trump’s administration could approve the move.

The prospect appeared to dim with the resignation of former national security adviser Michael Flynn, who discussed the move with high ranking Turkish officials including the country’s ambassador to Washington.

A spokesperson for the US State Department made no direct mention of the cleric in a statement marking one year since the coup attempt, but supported tolerance and dissent.

Heather Nauert praised “Turkey’s brave and dedicated citizens of all backgrounds and political views [who] defended their democracy against an attempted coup”.

“We reaffirm the United States’ steadfast support for Turkey’s democracy and democratic institutions,” she continued.

“The preservation of democracy requires perseverance, tolerance, dissent, and safeguards for fundamental freedoms.

“Persistent curbs on those fundamental freedoms erode the foundations of democratic society. More voices, not fewer, are necessary in challenging times.”