Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Police forensic investigators at an address in Elsmore Road, Greater Manchester, after the attack on Monday night Credit:Danny Lawson/PA Wire Suicide bomber Salem Abedi grew up in south Manchester, which has been home to a string of extremists and terrorists in recent years, many with strong Libyan connections.Security services were last night urgently investigating if Abedi, 22, whose parents came to the UK from Tripoli in the early 1990s, had links to fellow Libyan terrorist, Abdalraouf Abdallah and his brother Mohammed. Security services are investigating whether Abedi is part of a network which has links to Mohamed Abrini, also known as “the man in the hat”Credit:Belgian Police He may also be linked through others to former RAF veteran and Muslim convert Stephen GrayCredit:YouTube Abdalraouf, 23, was jailed for five and a half years in July last year after being convicted of trying to help other Manchester based jihadis to join Isil.Among those he helped try to get to Syria was former RAF veteran, and Muslim convert Stephen Gray, who also grew up in the Moss Side area of Manchester.Abdalraouf, who like Abedi, was the son of Libyan dissidents, travelled to Libya in 2010 on a gap year. In 2014, chemistry teacher, Jamshed Javeed, who lived just a short distance from the Abedi family and taught at a school in Bolton was jailed for trying to join to Isil.He was arrested after his family became concerned about his increasingly radical behaviour and reported him to the authorities. But when the Arab Spring began he joined an Islamist group known as the 17 February Martyr’s Brigade.During one anti-Gaddafi rally, he was shot and paralysed and confined to a wheelchair.It was when he returned home, the 23-year-old began encouraging friends and associates to join Isil.He was also known to have extremist connections in Belgium where Mohamed Abrini, known as the Man in the Hat, linked to the Brussels and Paris attacks was from. As well as Gray, Abdalrouf also raised cash and tried to arrange firearms for his brother Mohammed and fellow Mancunian, Raymond Matimba, who is thought to still be in the war torn country.The security services were also understood to be exploring Abedi’s links with notorious Mancunian jihadist Raphael Hostey, who recruited dozens of young Britons to fight for Islamic State.Hostey, who was two years older, grew up in Moss Side, just a mile away from Abedi’s home in the Fallowfield district of the city.Using the nom de guerre, Abu Qaqa al-Britani, he played a key role in persuading young Muslims from the North West to travel to Syria and Iraq. In 2014, 19-year-old Mohammad Azzam Javeed was killed while fighting in Syria.He had been due to start a chemical engineering degree, but headed to Syria with local friend Anil Khalil Raoufi, who was also killed.While the area was once plagued with gang violence, community leaders have reported youngsters increasingly being drawn into extremism.In total at least 16 jihadists, who have either been convicted of offences, have travelled to Syria or have died while fighting with Isil, hail from a three mile radius around the south Manchester district which was home to Abedi.In terms of the number of terrorists, Manchester is third only to London and Birmingham . One forensic officer carries a “Know Your Chemicals” book as he leaves the property Credit:JULIAN SIMMONDS He was killed in a drone strike in Syria last year, leaving a wife and child back home in Manchester.Earlier this year Ronald Fiddler, aka Jamal al Harith, blew himself up in a suicide attack in Mosul.Another Manchester born jihadist, Fiddler had been detained in Guantanamo Bay after being arrested in Afghanistan, but joined Isil after being released and receiving a large compensation payout. Abrini visited Manchester in 2015 and took photographs of the Old Trafford football stadium before receiving cash from sympathisers and returning to Belgium.