Officers are keen to trace several people seen in the area at around the time.
Police say a second man has been arrested in connection with a murder in Bristol on Friday night.
The body of Andrew Groves, 47, from Avonmouth was found on Friday at a property in Lawrence Weston. A post-mortem found he had died from multiple blows to the head.
Avon and Somerset Police say a 41-year-old man has been arrested on suspicion of murder and remains in police custody.
Another man arrested over the weekend on suspicion of murder remains in police custody.
Police say the investigation is ongoing.
A murder investigation is underway after a man died in Lawrence Weston on Friday.
Arsonists have targeted a community farm in Bristol for the second time this year.