The father of the Manchester Arena terrorists, who police still want to interview in connection with the attack, is undergoing medical treatment in Istanbul, The Telegraph can reveal.
Ramadan Abedi was arrested in Libya alongside his youngest son, Hashem, in the wake of the 2017 bombing.
But while Hashem was successfully extradited to Britain to stand trial, Ramadan was released by the Special Deterrence Force, the government-backed militia, and apparently vanished.
Last week, Hashem, 22, was found guilty of helping older brother Salman murder 22 people and injure hundreds of others.
Following the verdict, Detective Chief Superintendent Simon Barraclough said police still wanted to speak to Ramadan and his wife, Samia Tabbal, as part of the ongoing investigation.
It was thought the couple were still in their home city of Tripoli, but The Telegraph has learnt that Ramadan is now in Turkey.
Sources in Istanbul said he had been visiting the Turkish capital regularly to undergo medical treatment, which is being paid for by the Libyan government.
It is not clear what the nature of the treatment is, but sources said he had been there for some time.
Ramadan, who works as a mid-level functionary with the interior ministry, fled Libya for the UK in the late 1990s to escape the Colonel Gaddafi regime.
He settled in Manchester with his wife and they had six children, including Salman and Hashem.
But during the Arab Spring, Ramadan returned to Libya to help overthrow Gaddafi and moved back there permanently in 2016, leaving the boys behind.
Following last week's guilty verdict in the trial of Hashem, Mr Barraclough said there were still matters he wanted to speak to the parents about.
The Abedi brothers had claimed thousands of pounds in benefits, some of which were used to finance the construction of the bomb.
Mr Barraclough said: "We have not spoken to the parents. They've not been back to the UK. Libya is quite a difficult place to do anything with at the moment.
"It was difficult enough getting Hashem Abedi back. I think we have to be very careful about how we approach people in Libya. We have not spoken to the parents.
"We have made requests of Libyan authorities in relation to other areas of the investigation. Clearly there are circumstances about the management of the parental home, circumstances about the management of the finances, that relate to that."
Following his release from detention in Tripoli, Ramadan moved back to a large rented property in the city.
But the family were forced to flee their home after the area in which they lived became a frontline in the latest fighting between Libya's two main armed factions, the UN-backed Government of National Accord and the rival Libyan National Army.
They relocated to another rented property in the Libyan capital, but refused to discuss the Manchester attack by their sons.
One local Libyan journalist told The Telegraph that Ramadan had regularly been seen around Tripoli, often seen drinking tea in local cafes, but had been making regular trips to Istanbul for medical treatment.
His hospital bills are understood to be paid by the Libyan government, for whom he worked in the past as a civil servant in the interior ministry.