Two top Brazilian businessmen have been arrested as part of a major investigation into corruption at state-owned oil giant Petrobras.

 

Marcelo Odebrecht heads the Odebrecht group - Latin America's largest construction conglomerate.

 

Also detained is Otavio Azevedo, boss of Andrade Gutierrez, another top construction company.

 

Investigators allege firms paid corrupt officials in order to get lucrative Petrobras contracts.

 

The scandal has rocked Brazil's governing Workers' Party, with top politicians accused of taking bribes.

 

But President Dilma Rousseff, who chaired Petrobras when much of the corruption is believed to have taken place, has been cleared of involvement.

(BBC)