Massive error by the security team but glad that the threat wasn't a real one.
https://www.theguardian.com/footbal...curity-alert-leads-to-old-trafford-evacuation
A fake bomb planted by a security company as part of a training exercise at Old Trafford caused the cancellation of Manchester United’s final Premier League game of the season when the external firm forgot to take it away with them.
The colossal security blunder led to United’s home stadium being evacuated 20 minutes before kick-off against Bournemouth after an “incredibly lifelike explosive device” was found at the ground.