Brazilian police say they have asked prosecutors to file charges against former presidential chief of staff Jose Dirceu for his alleged involvement in the massive corruption scheme at state-owned oil company Petrobras.

Dirceu is the most senior member of the ruling Workers' Party to be taken into custody in connection with the scheme.

The federal police department said in a statement issued Tuesday it has asked prosecutors to charge Dirceu with corruption, racketeering and money laundering.

Dirceu served as former President Luiz Inacio Lula da Silva's chief of staff between 2003 and 2005. He was arrested early August in his home, where he was under house arrest serving an 11-year sentence for his involvement in a cash-for-votes scheme in Congress more than 10 years ago.