Tomatina festival: 20,000 revellers pelt tomatoes in Bunol, Spain

More than 20,000 people have been drenched in red pulp after hurling tonnes of ripe tomatoes at each other in the annual Tomatina street battle in eastern Spain.

Extra security measures were taken at the fiesta in Bunol this year following the vehicle attacks in and near Barcelona this month, with some 700 agents deployed.

The party saw 160 tonnes of tomatoes offloaded from trucks into crowds jamming the town's streets for the hour-long battle on Wednesday.

Participants, including many tourists, don swimming goggles to protect their eyes.

Organisers hose the streets down within minutes of the event's end at noon, while participants use public showers.

The event, which costs $US12 ($A15) to attend, was inspired by a food fight between local children in 1945 in the tomato-producing region.

AP