Venezuela's ambassador to the United Nations is ruling out cooperating with U.S. investigations into billion-dollar bribery schemes that allegedly occurred at the country's state-run oil company while he was in charge.

The allegations surrounding corruption at the PDVSA oil company are casting a pall over Ambassador Rafael Ramirez as Venezuela takes over the rotating presidency of the powerful Security Council on Monday.

In an interview with The Associated Press, Ramirez said he was not concerned about the possibility of being indicted as part of the U.S. investigations into corruption at the PDVSA oil company. Ramirez was president of PDVSA for a decade until his appointment as U.N. ambassador in 2014. He asked rhetorically, "Do you think I am going to accept the jurisdiction of another country on national matters?"