Colchester triple murder inquiry: Officers inspect drains
Officers investigating the deaths of three men have been spotted inspecting drains.
Essex Police said a 32-year-old man was being questioned on suspicion of murder over the deaths in Colchester on Saturday night.
Two men were discovered at a property on Wellesley Road and a third was found in a car outside.
A neighbour described finding the man slumped in the car as "horrible".
Police believe a "sharp, pointed weapon" was used in the killings, which are not thought to be linked to drugs.
On Monday a forensic officer was seen carrying an item with a black and orange handle away from the area in an evidence bag.
Steven Pilch, who lives on the road, called the police after discovering the man in the car on his way home from the cinema.
He said: "We go in the back of the property and there was a man slumped in the car, sort of wounded, blood, pretty horrible.
"There were two other guys there, one related to the flat behind the car and that was the flat we believed was involved, where there were two bodies."
'Carnage in the flat'
Mr Pilch said the killings did not seem real and he had not know the full extent of what had happened until after the police arrived.
He said: "That's when it became apparent there had been carnage in the flat.
"It doesn't really feel that real, it was dark and maybe if it had been daytime you could see all the blood, it would have been pretty sickening."
Officers, who were called to the scene at about 22:15 BST, said they were "keeping an open mind" about the circumstances.
The force urged anyone in the area between 18:00 BST on Saturday and 01:00 on Sunday who saw anything suspicion or unusual to contact them.
Det Supt Stephen Jennings said officers were not looking for anyone else in connection with the deaths and that it appeared the killings had involved "a sharply-bladed weapon or knife".
He said: "We do think that it is isolated. We do think that the person in custody probably knew those who sadly died but we are keeping an open mind."
Members of the public in the area have been warned to expect some disruption and Det Supt Jennings asked people to look out for any weapons or blood stained clothing.