A suspected explosive device was found by a member of the public in Warburton at 8.50am on April 3.
Police were alerted and found a metal hip flask on Carr Green Lane in Warburton which is currently undergoing examination to determine its contents by the explosive ordinance disposal team.
The area was sealed off and local residents were evacuated as a precaution, but have now been allowed to go back home and the area declared safe by police.
Detectives are now appealing to the public to help them find out how the item came to be there.
Detective Inspector Simon Akker from GMP’s Trafford borough said: “I know this incident would have caused concern for people living in the immediate area, as well as further afield.
“Following forensic work and extensive esquires by specialist officers we can confirm this is not being treated as terrorism related.
“I would like to thank the community for their patience and understanding while we carried out initial investigations and I’m pleased to report all cordons have now been lifted across the area.
“Key to this investigation is finding out who left the item in the area and why, and whilst my team of officers trawl through CCTV and forensic work I also truly believe the public could hold answers as well.
“If you have seen anyone recently who might have appeared to be acting suspiciously, or perhaps someone pulled up in a car nearby, then please call us.
“You might think it’s nothing, but it might be something to us and could prove vital in working out exactly what happened,”
Anyone with any information should call police on 0161 956 7530 or 101 quoting incident number 460 of 03/04/2017, or you could give information anonymously to Crimestoppers on 0800 555 111.