The incident happened at around 3am on Monday morning along the Albufeira strip. Local business owners said some of the estimated 1,000 tourists believed to have travelled to Portugal for a festival had acted 'disgracefully' during their stay in the resort.

But some of the holidaymakers accused the police of overreacting.

The tourists formed part of a group called Invasion Portugal, though organisers have distanced themselves from the trouble and said they do not condone the behaviour displayed.