An inquiry has been called into yesterday's events at Old Trafford.
UPDATED
A suspicious item discovered at Old Trafford on Sunday was a training device, police have confirmed.
The Premier League match between Manchester United and Bournemouth was called off after a suspect package was found shortly before kick-off and a controlled explosion carried out.
Police said the item had "accidentally been left by a private company following a training exercise".
The match has been rearranged for Tuesday at 20:00 BST.
A Greater Manchester Police (GMP) statement read: "Shortly before today's planned football fixture, staff from the Manchester United ground alerted police to a suspicious item that had been found in the toilets within the North West Quadrant, between the Sir Alex Ferguson stand and the Stretford End.
"Police quickly attended and explosive experts were called in to assess the item, which has been described as an incredibly realistic-looking explosive device."
The Sir Alex Ferguson Stand and the Stretford End were evacuated and sniffer dogs brought in.
Kick-off was delayed initially and shortly afterwards the match was abandoned on police advice.
A bomb disposal team carried out the explosion at about 16:30 BST.
Assistant chief constable John O'Hare said: "I am grateful to the Manchester United and Bournemouth supporters for their support and assistance today.
"Following today's controlled explosion, we have since found out that the item was a training device which had accidentally been left by a private company following a training exercise involving explosive search dogs.
"While this item did not turn out to be a viable explosive, on appearance this device was as real as could be, and the decision to evacuate the stadium was the right thing to do, until we could be sure that people were not at risk."
UPDATED
A controlled explosion has taken place at Old Trafford.
Manchester United's final-day match against Bournemouth has been called off because of a suspect package found in the stand.
Two stands - the Sir Alex Ferguson Stand and the Stretford End - were evacuated before the home game against Bournemouth and sniffer dogs brought in to search the stands.
Kick-off, due at 15:00 BST, was delayed and shortly afterwards the match was abandoned on police advice.
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