Thousands of revellers have doused each other with wine to celebrate the start of the famed San Fermin running of the bulls festival in the northern Spanish city of Pamplona.

The festival started with the traditional launching of a fireworks rocket - known as the Chupinazo - from the town hall balcony as the heaving crowd packing the square below began jumping and screaming "Viva San Fermin".

The Chupinazo takes place a day before the first of eight 8am bull runs in which daredevils race ahead of hulking fighting bulls through winding streets to the city's bullring.

The nine-day street partying fiesta was immortalised in Ernest Hemingway's 1926 novel The Sun Also Rises.