A man is fighting for his life following a stabbing at Notting Hill Carnival.
He was rushed to hospital after emergency services were called to Wornington Road in Kensington and Chelsea at 4.25 this afternoon.
Scotland Yard said it had arrested a man on suspicion of causing grievous bodily harm.
The attack is one of four stabbings reported on the carnival's first day, dedicated to children and families.
Minutes later, officers were called to reports of another stabbing on Portobello Road, where one person was taken to hospital.
Less than an hour later, two more men were taken to hospital following a double stabbing on Ladbroke Grove.