A 27-year-old man has been arrested on suspicion of murdering a man whose body was found at a former industrial unit in Essex with 6,000 cannabis plants.
The victim, who has not been identified, was discovered at South Woodham Ferrers on Thursday.
Police said they are maintaining a uniformed guard at the unit in Redhills Road while forensic teams carry out an investigation.
The arrested man, from east London, has been bailed until February.
He was also arrested on suspicion of burglary and drug offences.
The man's body was discovered by police following reports of a burglary.
Cannabis worth £1m
Det Ch Insp Mark Hall, of the Kent and Essex Serious Crime Directorate, said: "We can confirm that about 6,000 growing plants were found at the unit.
"The plants had an estimated street value of about £1m.
"We are still carrying out extensive enquiries to establish the identity of the man who died and would urge anyone with information to come forward."
The man is thought to be in his 30s or 40s and was of south east Asian origin, police said.
He was 5ft 7in (1.70m), slim, with with dark hair which was about 1in (2.5cm) all over.
He had a goatee beard, uneven discoloured teeth and a distinctive small tooth between his main two front upper teeth.
Detectives are still appealing for information about an earlier incident in Redhills Road on Thursday morning.
Police were called following a report of suspicious activity at about 0530 GMT and a number of people left the scene as police arrived.