Brazil prosecutors seek to extend Batista detention, source says

SAO PAULO, Sept 14 (Reuters) - The Office of Brazil's Prosecutor-General Rodrigo Janot asked the Federal Supreme Court on Thursday to convert the temporary detention of billionaire beef tycoon Joesley Batista into preventative detention, a person with knowledge of the situation said. (Reporting by Guillermo Parra-Bernal; Editing by Phil Berlowitz)