Pope Francis arrives in Brazil

Pope Francis has arrived in Brazil on his first trip abroad since becoming head of the Catholic Church in March.

The first Latin American Pope touched down at Rio de Janeiro airport on Monday afternoon and was greeted by President Dilma Rousseff.

The Argentina-born pontiff has travelled to Brazil to attend the Roman Catholic World Youth Day festival.

En route, the Pope told reporters that the global crisis risked creating a lost generation of jobless youth.

As he left the Alitalia plane, he was welcomed by President Rousseff to cheers and applause from the waiting crowd. A choir sang and he was presented with a bouquet of flowers.

The Pope waved before being taken by motorcade to the centre of Rio, where large numbers of pilgrims have gathered. 

The authorities have increased security during the Pope's visit, following weeks of nationwide protests against corruption and bad governance. 

Pope Francis has refused to use an armoured Popemobile, despite requests from Brazilian officials. Some 22,000 security staff will be on duty during his visit.

More than a million young Catholics are expected to gather in Rio for World Youth Day, which takes place every two years, and is a celebration of the Catholic faith.

The Pope is due to lead a service on Copacabana beach, and visit a shanty town.

Speaking to reporters on his flight from Rome, the Pope said "we run the risk of having a generation that hasn't worked," even though work confers dignity.

He also criticised what he said was a "culture" of socially rejecting the elderly who were "thrown away" as if they had nothing to offer.