On Wednesday, British police found 39 dead bodies in truck container at an industrial estate to the east of London.
Police supposed that the truck came from Bulgaria and entered Britain at Holyhead in Wales on Saturday.
Police added that it has arrested the lorry driver on suspicion of murder.
Moreover, the chief superintendent, Andrew Mariner said that the department was in process of identifying the victims.
Further, he said that the process could take time. He also told that the driver would remain in police custody until the enquiries continued.
The emergency services said that they discovered the dead bodies in the container at Waterglade industrial park in Grays, located by river Thames.
The location was about 20 miles away from central London.
Among the victims, 38 were adults and one was teenager. The emergency services pronounced all dead at the scene.
A junior interior minister called it the tragic news on loss of life. He said that his thoughts were with victims, their families and friends.
Additionally, he told that the police were working to bring the culprits to justice.