The National Office of Electoral Processes extended voting into Monday for thousands of citizens in Lima and the US after logistical failures paralyzed polling stations.The Prosecutor's Office launched an investigation into technical breakdowns following delays that affected 63,000 voters and prompted fraud allegations from Rafael López.With 35 candidates competing for the presidency and a new bicameral Congress, a runoff election is expected on June 7 as no clear winner emerged from the initial count.