Investigation after Old Trafford 'bomb' is identified as training device

Tony Lloyd - also the city's police and crime commissioner - said the false alarm was a "fiasco," which had endangered supporters.

Police said an "incredibly lifelike" device - which caused the club's final Premier League game of the season to be abandoned - had been used in a training exercise involving explosive search dogs.

He said: "It is outrageous this situation arose and a full inquiry is required to urgently find out how this happened, why it happened and who will be held accountable.

"This fiasco caused massive inconvenience to supporters who had come from far and wide to watch the match, wasted the time of huge numbers of police officers and the army's bomb squad, and unnecessarily put people in danger, as evacuating tens of thousands of people from a football stadium is not without risk?

"Whilst this in no way demeans the professionalism of the police and stewards responsible for getting the fans out, or the supporters' calmness and cooperation during the evacuation, it is unacceptable that it happened in the first place."

Reports of a suspect package at Old Trafford prompted the evacuation of The Stretford End and Sir Alex Ferguson Stand around 20 minutes before the 3pm kick-off.

Those remaining in the 75,000 seater stadium were told the game against AFC Bournemouth was off shortly after 3.15pm.

A controlled explosion was carried out but Greater Manchester Police (GMP) later confirmed the device - found in the ground's North West Quadrant - was not viable.

It is thought to have consisted of a mobile phone attached to a pipe or canister. 

Assistant Chief Constable John O'Hare from GMP said: "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.

"Whilst 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."

Ed Woodward, United's vice-chairman, said the club will "investigate the incident to inform future actions and decisions".

He added: "The safety of fans is always our highest priority.

"I'd like to thank the support from the police which was first class and the impeccable response from fans of both teams.

"The club takes security very seriously and staff are regularly trained with the police and emergency services to identify and deal with these incidents."

It is understood that both sets of players were kept in the dressing rooms for around 40 minutes before being taken to a suite, being looked after by security and hospitality staff.

The game was called off after discussions between the Football Association, the Premier League and police.

The abandoned game has been rescheduled for Tuesday at 8pm, with fans offered refunds for their Sunday ticket, as well as free entry for the rearranged fixture.

Sporting events have been on heightened alert since November when the Paris attacks began with three suicide bombers attempting to get in to the Stade De France in Paris, where France were playing a friendly international against Germany.

France remains on high alert and hosts the European Championships starting next month, at which security will be a major focus.

The incident comes in the week that the terrorist threat level to Great Britain from Northern Ireland was raised from moderate to substantial, and police in Manchester carried out a training drill simulating a suicide bomb attack on the Trafford Centre in Manchester.