Transport and other public services across Spain have faced serious disruption on Wednesday in the nation's first general strike in 14 years.
The main unions called the strike over housing and the high cost of living, with demonstrations planned across the country.
It comes nearly two weeks before Spain's parliamentary elections, which will be held on 29 November.
Prime Minister Pedro Sánchez called snap elections last month after parliament failed to approve his plan for housing reform.
The BBC's Nick Beake reports from the protest in Madrid.