The team from the Metropolitan Police travelled to the Algarve after Portuguese police were asked to help with tracing three suspected burglars seen in the area where Madeleine disappeared, according to a report in the Daily Mirror newspaper.
British detectives, including the senior investigating officer Detective Chief Inspector Andy Redwood, met on Tuesday with members of Portugal’s Policia Judiciaria and prosecutors in Faro.
The Daily Mirror reports that discussions were focused on getting local officials to sanction the arrest and questioning of the suspects, believed to be a burglary gang.
Madeleine disappeared from the family’s apartment while her parents were eating out at a nearby restaurant with friends in the Praia da Luz holiday resort.
Officers have visited Portugal on a number of occasions during the last 18 months.