London (CNN) Paramedics discovered the bodies of 39 people in a truck container at an industrial park outside London in the early hours of Wednesday morning. All victims -- including 31 men and eight women -- are believed by police to be Chinese nationals.

UK police appear to have established that the truck and its container followed two separate routes -- coming together towards the end of the journey shortly before the grisly discovery.

Here's what we know about the timeline so far, according to authorities in the UK and Belgium.

Sunday

The truck itself is thought to have entered Great Britain through the Welsh port of Holyhead on Sunday after traveling over from Ireland, according to Essex Police. Investigators believe the truck -- which was registered in Bulgaria in 2017 -- originated in Northern Ireland.

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