(BBC News) Venezuelan politician Henrique Capriles has registered as the presidential candidate for a coalition of more than 30 opposition parties in polls due in October.
After leading a march through the streets of the capital, Caracas, Mr Capriles vowed to fight crime and root out corruption.
President Hugo Chavez, who is recovering from cancer, is due to register on Monday.
He is running for a third term.
For further details, see the BBC news article at this link: http://www.bbc.co.uk/news/world-latin-america-18390153