A play called Sex that lasts 27 hours has been shocking theatre audiences in Spain.

It features four actors, two men and two women, and there is no intermission in the entire performance.

The actors eat, sleep and have sex during the show, while the audience is free to come and go as they like.

Created by Chilean writer Juan Carlos Montagna, Sex was performed in a pub basement in Madrid's fashionable Malasana neighbourhood.

It started at 8pm on a Saturday night and finished at 11pm the next night.

Montagna told Las Ultimas Noticias that Sex was not a reality show: "There is no improvisation in it, it's pure drama," he said.

The Spanish press described it as the "most bizarre and shocking theatre experience in years".