A post-mortem examination is to be held after an unknown man collapsed and died in a public toilet in Harlow.
Essex Police said two of their officers were approached by a passer-by on Wednesday at about 1025 GMT and were told about a man who had collapsed and was not moving.
Officers found the man, who was not breathing, on the floor of a toilet near London Road and tried unsuccessfully to resuscitate him.
A police spokeswoman said the area was sealed off and an investigation launched until a cause of death could be established.
A post-mortem examination was to take place on Thursday afternoon.
Essex Police were also keen to speak to the passer-by who informed officers about the man and have urged him to come forward.