The Brazilian attorney general's office said Monday that it has asked the country's highest court to authorize corruption investigations into a prominent opposition figure and other top politicians, according to AP. Attorney General Rodrigo Janot based the request on plea bargain testimony by a prominent senator ensnared in the sprawling corruption probe centered on Brazil's state-run Petrobras oil company. His office confirmed those targeted include opposition presidential candidate Aecio Neves, who narrowly lost the 2014 election to President Dilma Rousseff, who is facing an impeachment effort in Congress. News reports said top officials in the opposition PMDB party, including party head Sen. Romero Juca, are also objects of Janot's requests, but the attorney general's office did not confirm their identities.