LONDON (AFP) - Huge crowds partied in the streets of London Monday as the Notting Hill Carnival drew to a close with little sign of trouble despite fears of riots at Europes biggest street festival. The second day of festivities passed largely peacefully with 6,500 police officers, the biggest number in recent years at the Caribbean-themed extravaganza, on duty as spectators watched Samba-style dancers perform on floats. However, the event was marred after a man was found in Ladbroke Grove late Monday with stab wounds to his abdomen and hand. He remained in a serious condition, but police said they were happy with the events overall mood.