The body of a man was found under a bridge in Astley Village, Chorley in the early hours of Friday morning.
Police were called to the scene near McColls newsagents on Hall Gate at around 1.45am yesterday.
The man, in his 20s, had been discovered by a passerby.
Force incident manager inspector Kim Sturges said: “We were called to reports of a male under the bridge on Friday morning.
“The male was discovered by a passerby.”
Police are treating his death as “unexplained” at this point.
His family have been informed.