One of the world's most wanted people-smugglers has been arrested after an operation involving Britain's National Crime Agency and GCHQ.
Mered Medhanie, dubbed "The General", is said to be the mastermind of an international smuggling network who is responsible for the deaths of hundreds of migrants in the Mediterranean.
The 35-year-old Eritrean, who earned the nickname because he styled himself on former Libyan dictator Muammar Gaddafi, was arrested in the Sudanese capital Khartoum in May before being extradited to Italy on Tuesday.
It is thought he ran an empire smuggling thousands of migrants from Africa and the Middle East into Europe by regular journeys across the Mediterranean.
Tom Dowdall, NCA deputy director, said: "Medhanie is a prolific people-smuggler and has absolute disregard for human life.
"Although he was operating thousands of miles away, his criminal activity was impacting the UK. Medhanie no doubt thought he was beyond the reach of European justice but we were able to support the Italians by tracking him down to Sudan."
According to Italian prosecutors Medhanie was responsible for the death of 359 migrants who drowned after their boat sank off the Italian island of Lampedusa in 2013.
In an intercepted conversation he could be heard laughing about the fatal overloading of migrant ships.
In other recordings he discussed organising journeys across the Mediterranean and co-ordinating smuggling gangs.
Operation Glauco, a probe set up by the Italian authorities in the wake of the Lampedusa tragedy, was assisted by NCA officers from the UK Immigration Crime Taskforce in tracking down the kingpin to an address in the El Diem area of Khartoum.