Ecuadorean authorities have detained a former energy minister amid an investigation into alleged bribery linked to state oil firm Petroecuador, the attorney general’s office said on Monday.

An investigation of Xavier Vera, Ecuador’s former minister of mines and energy, began last October following several corruption allegations, including that he arranged jobs at Petroecuador in exchange for bribes.

“The attorney general’s office, with the support from (Ecuadorean police) executed an arrest warrant against Xavier V., within an investigation for alleged bribery,” the attorney general’s office wrote in a message via Twitter, referring to Vera.

Vera, who served for six months before resigning last October, has denied the accusations, calling them slanderous and an effort to discredit the government of President Guillermo Lasso