Only one paramedic was at the scene of the Manchester Arena bombing for the first 40 minutes after the explosion, an inquiry into the attack was told.
Twenty-two people were killed and hundreds more injured when Salman Abedi detonated a suicide bomb as 14,000 fans left the arena in May 2017.
The inquiry heard the sole paramedic had arrived in the arena foyer 18 minutes after the bomb went off.
But at least eight ambulances had arrived nearby after 40 minutes.Lead counsel Paul Greaney QC said the public inquiry would have to consider whether lives were lost as a result of a failure to co-ordinate the response of emergency services.
Within 10 minutes of the bomb exploding at 22:31 BST, 12 British Transport Police (BTP) officers had run into the arena foyer carrying first aid.