GETTY A Turkish soldier guards the country's border with Syria

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The Turkish government has been accused of a mass cover-up by opposition MP Erem Erdem, who passed the transcriptions from Ankara security services on to the media. They detail conversations between known ISIS terrorist Ilhami Bali and several associates inside Turkey, as they discuss the exact number of people they have smuggled into the country. In one angry exchange, Bali - who is suspected of orchestrating several terrorists attacks in Turkey - threatens to shoot his contact in the head, after one attempt to smuggle 18 militants over the border ended with 15 of them being arrested.

But further conversations reveal those who are arrested are later released from police custody with the the help of Daesh affiliates, while other injured jihadists are being treated for their injuries in Turkish hospitals. Erdem, a member of the Republican People's Party and an outspoken critic of Turkish president Recep Tayyip Erdogan, said the leaked documents were "dirty proof" the government was turning a blind eye to ISIS operations inside the country.

GETTY A huge concrete wall on the Turkish Syrian border has not stopped ISIS getting in

Speaking at a press conference in which he presented the 422 pages of wiretaps, Erdem said: “These entries recorded comprehensive information such as which hotel the terrorists are going to stay in, where they will wait for their car, which gas station they will use for refueling in a mosque in Kilis, how many people and who exactly would be responsible for the preparation of a terrorist attack. “Despite the fact that all this information was in the hands of the authorities, the security forces had not carried out any operations to detain terrorists. "I ask one very simple question: why were these terrorists not arrested?”

GETTY Turkish president Recep Tayyip Erdogan has been accused of a government cover up

Security logs from the Turkish Armed Forces show 961 ISIS members from 57 different countries had been detained at the Turkish Syrian border in 2015, RT reported. But the publication of the recorded phone messages seem to reveal thousands more successfully crossed over without being stopped, despite security forces listening in to the plans. In one conversation, Bali asks his associate how many people have crossed into Turkey. The man replies: "1,128."

GETTY Leaked documents reveal more than 1,000 ISIS militants have been smuggled into Turkey

I ask one very simple question: why were these terrorists not arrested? Erem Erdem

In another conversation, he threatens to kill his interlocutor, named Erkek, who he blames for 15 associates being arrested as they tried to cross the border. During the shocking transcript, he says: ”If I ever hear that you try to pass our guys through, I will come in your house and shoot you to your head. "I will shoot your head while you’re in bed.”

Blast in the Turkish capital Ankara Sun, March 13, 2016 As many as 50 people have been injured and several feared dead after an explosion in Ankara, Turkey. Play slideshow 1 of 13