Belgium terror incompetence laid bare: How all THREE Brussels suicide bombers were flagged up by Turkish authorities and left to commit mass murder in Europe

New reports have revealed astonishing lapses in security and intelligence after it emerged all three Brussels bombers had visited Turkey in the past two years, raising suspicion with local authorities looking to deport them.

Brussels airport suicide bomber Ibrahim El-Bakraoui, 29, was deported from Turkey not once, but twice, in the past year, and sent back to Europe.

However, because Belgian authorities told Turkey that the records of both Khalid El-Bakraoui and Najim Laachraoui were 'clean' neither were deported. 

Listed: Both Khalid (L) and Ibrahim (R) El Bakraoui and had visited Turkey in the past two years, but despite suspicions from Turkish authorities, only Ibrahim was deported back to Europe

The Turkish government issued multiple warnings to Belgian and Dutch counterparts regarding the three Brussels bombers, according to a report citing two unnamed Turkish officials.

Ibrahim El-Bakraoui went to Turkey first in June of 2015. CNNTurk reports: 'Ibrahim el Bakraoui came to Gaziantep in late June 2015 to join ISIS. 

'Gaziantep Anti-Terror Intelligence District Authority teams monitored Ibrahim el Bakraoui who was trying to contact some people to pass the border [into Syria].'

The province of Gaziantep, is on the Syrian-Turkish border, across from the 62 miles controlled by ISIS.

Suspicious: Turkish authorities contacted Belgium to look into Najim Laachraoui, but as they responded his record was 'clean', he was not deported

According to Turkish President Recep Tayyip Erdogan, Ibrahim El Bakraoui was detained on July 14, 2015. 

He said that Turkish officials informed the Belgian Embassy about the his deportation with a note, but that Belgian officials could not find any link between El Bakroui and terrorist networks, so he was released. 

President Erdogan said that Netherlands officials were also notified.

A determined Ibrahim El Bakraoui returned a second time to Turkey, less than a month after his first deportation. 

He landed in the southern airport in Antalya on August 11, 2015, another unnamed Turkish official told Reuters. 

By this point, his name was already on Turkey's blacklist, so Turkish officials deported him, yet again, on August 25. 

Unbelievably, Ibrahim El Bakraoui was still not apprehended by EU officials. 

These claims have since been slammed by both Belgian and Dutch authorities, who say that he was only deported once, and was never flagged as a possible terrorist by Turkey.

The 30-year-old ISIS militant was not on any Dutch or international wanted lists, Dutch justice minister Ard van der Steur said on Thursday.

'We checked with our Belgian, German and Turkish colleagues and in all cases he was not registered in our systems,' Van der Steur told a news conference. 

According to the pro-government newspaper Yeni Safak, the other two known Brussels attackers had also come to Turkey before Ibrahim. 

His younger brother Khalid, 27, apparently landed in Istanbul's Ataturk airport on November 4, 2014 and Turkish officials monitored him before he left the country ten days later. 

Ibrahim el-Bakraoui (centre) can be seen walking through the airport terminal on the morning of the attack, just moments before he and fellow bomber Najim Laachraoui (left) detonated their explosives

Terrorist: Ibrahim El Bakraoui, 30, was deported to the Netherlands in July 2015 as a 'foreign terrorist fighter, after being detained just a few miles from the border with ISIS's heartland in Syria, Turkey has said

Belgian authorities apparently didn't issue a warrant for his arrest until December 12, 2015, and then filed an Interpol red notice for suspected 'terrorism' ties on March 2, 2016.

Najim Laachraoui, 24, the fellow Brussels airport suicide bomber and alleged master bomb maker who is believed to have been instrumental in the November 2015 Paris attacks which killed 130, also made his way to Turkey. 

Laachraoui landed in Turkey on February 17, 2014, but when authorities contacted their Belgian counterparts to inquire into his background, they responded his record was 'clean', so he was not deported.

It's not known when he returned to Europe, but on April 9, 2014, the newspaper reports Belgian police issued a warrant for his arrest for being 'a member of a terrorist organization', and his name was added to the long blacklist of suspected foreign jihadis banned from entering Turkey on June 16, 2014. 

Belgium apparently issued an Interpol red notice for Laachraoui on March 2, 2016, and French officials followed suit on March 18, 2016 - only four days before the deadly attack.

All three Brussels bombers had visited Turkey in the years before they carried out Tuesday's terrorist attacks at Zaventem airport (pictured) and a Metro station in central Brussels

The Brussels attackers are not the first who went to Turkey, and about whom Turkey warned EU officials. 

One of the Paris suicide bombers who attacked the Bataclan Theatre killing 89, Omar Ismail Mostefai, 29, was said to have went into Turkey in 2013, and thought to have gone on to Syria at some point. 

Turkish authorities say they warned France about possible terrorist links twice in December 2014 and June of 2015, but that French authorities did not respond until after the attack on November 13, 2015. 

Since the start of the Syrian Civil war in March of 2011, and ISIS's declaration of its caliphate in June of 2014, there's much proof that the vast majority of ISIS's foreign jihadi fighters, estimated at 20,000, have transited through Turkey. 

The aftermath of the explosions in Brussels airport, which killed 14 people. The Turkish government issued multiple warnings to Belgian and Dutch counterparts regarding the three Brussels bombers, according to a report citing two unnamed Turkish officials

Multiple reports have detailed the existence of safehouses for incoming would-be jihadis to stay and networks for transport to Syria. 

Turkish officials also continue to criticize Western powers for allowing Syria's President Assad to stay in power, and say that ISIS formed because of discontent with dictators like Assad. Paradoxically, they have also repeatedly stated that ISIS and Assad work together.

Throughout 2015, EU leaders repeatedly pleaded with Turkey to do more to stop foreign fighters transiting to Syria. 

In 2015, the Turkish government asked EU leaders to provide more extensive lists of suspects to be deported, and officials stepped up their efforts. 

In January of 2016, Turkey's Interior Minister defended the country's record. He said officials had formed a blacklist of 35,000 suspects from more than 120 countries as well as captured and deported 2,896 people from 92 countries. 

ISIS has established its territories in Syria and Iraq, but many, both native and foreign, live and operate in Turkey. A Turkish police intelligence report leaked in January of 2015 by local media estimated that up to 3,000 ISIS members could reside in Turkey in sleeper cells. 

The report advised police greater surveillance was needed of possible suspects. Turkish and foreign citizens have been victims of multiple ISIS attacks. Officials believe ISIS operatives are behind at least five of the bombings in Turkey since June of 2015, resulting in nearly 200 deaths of civilians.