Police in Brazil have added Ciro Nogueira, a senior senator and close ally of former President Jair Bolsonaro, to the expanding probe of Banco Master. Investigators say the inquiry, which has already rattled the country’s political establishment, now targets the lawmaker for alleged involvement in the bank’s questionable dealings.

The move widens a sweep that began with financial irregularities at Banco Master, a lender whose troubles have sparked concerns over credit exposure and market confidence. By implicating a figure of Nogueira’s stature, authorities signal a willingness to pursue high‑level political connections, potentially unsettling investors wary of regulatory risk in Brazil’s banking sector.

Analysts warn that the investigation could pressure the Senate’s legislative agenda and amplify calls for stricter oversight of financial institutions. Market participants will monitor any fallout for signs of credit tightening or shifts in capital flows, as the case underscores the nexus between politics and finance in a nation already grappling with economic volatility.