Portugal's monthly unemployment rate edged slightly higher to 5.7% in March from a revised reading of 5.6% in February, the National Statistics Institute (INE) said on Monday in its flash estimate.

The labour underutilisation rate in March was estimated at 11.1%, the same value as in the previous month, INE said.

(Reporting by Mariana Ferreira Azevedo; editing by Sergio Goncalves)