Britain's National Crime Agency (NCA) said on Thursday it had arrested an Egyptian man suspected of coordinating the smuggling of thousands of people across the Mediterranean from north Africa to Italy.
The NCA said it believed the 40-year-old man, detained in London on Wednesday, was working with people smuggling networks in north Africa to organise boats for migrants and then communicating with criminal associates during the crossings.
"We suspect this man has been running his operation from the UK, and masterminding the smuggling of thousands of migrants," Darren Barr, Senior Investigating Officer at the NCA, said in a statement.
"The type of boats organised crime groups use for crossings are death traps ... We will continue to share intelligence and take action with partners to prevent crossings and arrest people smugglers here and overseas."
The NCA, which has been working with Italian Guardia di Finanza as part of the investigation, cited a crossing in October last year where more than 640 migrants were rescued by the Italian authorities after they attempted to cross in a wooden boat from Libya.
Another in December saw 265 migrants rescued by the Italian coastguard from a 20-metre fishing boat found adrift in the Mediterranean after leaving Libya, the NCA said, while in April two search and rescue operations which followed distress calls to the coastguard found more than 600 migrants on each boat.
Iran and Israel targeted each other with missiles and airstrikes early on Saturday after Israel launched its biggest-ever air offensive against its longtime foe in a bid to prevent it from developing a nuclear weapon.
Israeli fire and airstrikes killed at least 35 Palestinians across the Gaza Strip, most of them near an aid distribution site operated by the US-backed Gaza Humanitarian Foundation, local health authorities said.
The death toll from the Air India plane crash in Ahmedabad rose to 270 on Saturday, as grieving families expressed frustration over delays in the release of victims' bodies, many of which were badly charred in the tragedy.
US President Donald Trump urged Iran on Friday to make a deal on its nuclear programme before it faced more attacks from Israel that he said would be "even more brutal."
Israel launched widescale strikes against Iran on Friday, saying it targeted nuclear facilities, ballistic missile factories and military commanders and that this was start of a prolonged operation to prevent Tehran from building an atomic weapon.