Jihadi John knife
More details about Mohammed Emwazi – aka 'Jihadi John' – have been revealed after his real identity was revealed. Reuters

Isis executioner Mohammed Emwazi – known as Jihadi John – was barred from entering Tanzania after a getting drunk during a 10-hour binging session on a KLM jet.

Emwazi, who was identified as the masked killer behind a string of ISIS executions – including James Foley and Alan Henning – flew to the Tanzanian capital Dar es Salaam in May 2009 en route to Somalia, but was refused entry due to his "very drunk" state, according to The Times.

The reports contradict earlier claims that the west Londoner was initially denied entry due to a tip-off from British security services.

Emwazi, who was 20-years-old at the time, was travelling with two friends including Briton Ali Adorus, 27, and a German man from Tanzania, Marcel Schrodl, 23.

Adorus is currently imprisoned in Ethiopia after being convicted of terror offences.

"They were refused entry because they disembarked from the plane very drunk," said Mathias Chikawe, Tanzania's Home Affairs minister. "They were insulting our immigration staff and other people.

"There was no information from anywhere that they were criminal suspects," the government official went on to add.

The trio were remanded in police custody before being put on a flight back to Amsterdam's Schipol airport, where Emwazi claims he was questioned by "Nick, from MI5".

Advocacy organisation CAGE recently released an audio recording of an interview with Emwazi in which he claimed the agent tried to "put words in my mouth" and added: "'We are going to keep a close eye on you, Mohammed. We already have been and we are going to keep a close eye on you' – threatening me."

Emwazi alleged the agent accused him of trying to reach Somalia to link up with terror group al-Shabaab, who are active in the Horn of Africa. But the young man, who was born Kuwait, denied the claims, insisting he was embarking on a safari trip.