Foreign Secretary Boris Johnson has said he will support an EU call for "restraint and moderation" in Turkey following the failed military coup.

Federica Mogherini, the EU's high representative for foreign affairs, said foreign ministers will send a "strong message" that the rule of law and the democratic system of checks and balances must be respected in Turkey in the wake of the putsch failure.

Belgian Foreign Minister Didier Reynders said Turkish authorities' reaction to the failed coup needed to be "proportionate." He said he was alarmed by the arrests of judges and calls for reinstatement of the death penalty against coup participants.

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

Some 8,000 police officers across Turkey have been removed following the attempted military coup.

The move comes as President Recep Tayyip Erdogan continues his "cleansing operation" after the attempt to oust him on Friday night by members of the country's military.

Over 6,000 people in the army, judiciary and other state bodies have been arrested following violent clashes in Ankara and Istanbul, where at least 290 people were killed.

Turkey rounds up thousands after failed coup

Soldiers closed the bridge over the Bosphorus river in Istanbul around 10pm local time on Friday, in the first part of their plot to overthrow the country's leadership.

Tanks were then stationed outside the main Ataturk airport in the city and soldiers took over the state broadcaster - forcing the newsreader to read out a prepared statement live on air saying a "peace council" was in control.

But President Erdogan - who was on holiday at the time of the coup - gave a defiant interview over FaceTime to urge his supporters to go out onto the streets and defy the coup.