According to The Telegraph, witnesses said there was a "stampede" for the cloakroom after Jessie J finished performing at 11.40pm.
A dispute broke out and a man was stabbed in the neck with a broken bottle.
They reported seeing a "huge" amount of blood.
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Ms Truss says numerous countries including the US and Japan are keen to secure trade agreements with the UK.
A preliminary count of 84 per cent of the votes showed Evo Morales on top with 45.3 per cent, followed by 38.2 per cent for his closest riva
The noon sitting will be largely symbolic, as the Assembly cannot perform its legislative functions without a ministerial executive in place