A lorry was arrested after five suspected illegal immigrants were discovered in a vehicle near London Gateway Port in Stanford-le-Hope.
Police and the ambulance service attended.
An Essex Police spokesman said: "We were contacted shortly before 4.30pm on Tuesday, 13 October with reports that people could be heard inside a lorry trailer on Ocean Boulevard, Stanford-le-Hope.
"Officers arrived and found four men and a teenage boy inside the trailer.
"The lorry driver, a 26-year-old man, has been arrested on suspicion of assisting unlawful immigration. He has been released under investigation."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article