LONDON (AP) — London police have made about 240 arrests at the Notting Hill Carnival as thousands of revelers turned out for one of Europe's largest street parties.

The Metropolitan Police reported at least four knife attacks during the two-day festival in west London, with a 15-year-old boy among those hospitalized. His condition, initially critical, is not considered to be life-threatening.

Most of the arrests were for drug and weapons offenses. Some people were arrested for more than one offense.

Monday is the final day of the event, a celebration of reggae music, steel drums and dancers that evoked the neighborhood's Caribbean roots.