Eight people have been arrested in Vietnam in connection with 39 people found dead in the back of a truck near London last month.
"Based on what we learn from the suspects, we will actively launch investigations to fight and eradicate these rings which bring people illegally to Britain," Nghe An province police chief Nguyen Huu Cau said.
This comes just days after Vietnamese authorities made two additional arrests, and called other people in for questioning.
Meanwhile, the UK police confirmed that all of those found in the truck were Vietnamese after initially believing they were Chinese.

US, Iran inch closer to deal, timing remains unclear
Switzerland votes on proposal to cap population at 10 million
Sirens sound in Jordan due to technical malfunction, state TV reports
India Air Force plane crash kills all five onboard
Ukrainian strike kills one, wounds 3 in southern Russia
Trump says US military strike killed leader of Venezuela's Tren de Aragua gang
Qatar rejects media report on energy production decisions
Trump says Iran war deal close as Strait of Hormuz tensions linger
