The circulation of the Metropolitano de Lisboa will be interrupted on Sunday due to a strike by workers, with disruptions expected from 23:00 on Saturday and the resumption of service only at 06:30 on Monday, the company said.

The strike, between 00:00 and 24:00 on Sunday, was called by the Federation of Transport and Communications Unions, against a lack of working conditions and the 0.9% salary increases proposed by the administration, among other reasons.

According to the union, the workers decided to maintain the strike, scheduled a few weeks ago, despite the announcement by Metropolitano de Lisboa that it has already started hiring train drivers and strengthening maintenance teams.

Sunday's stoppage takes place on a day when the Rock in Rio festival takes place at Parque da Bela Vista. In this regard, the organisation indicated that it has created, together with the Lisbon City Council, more car parks with 'shuttle' direct to the event venue.

Metropolitano de Lisboa operates daily with four lines: Yellow (Rato-Odivelas), Green (Telheiras-Cais do Sodré), Blue (Reboleira-Santa Apolónia) and Red (Airport-São Sebastião). Normally, the metro runs between 06:30 and 01:00.