A British woman has been badly injured in an acid attack in Alvor, Portimão.
Two members of the GNR also were injured after inhaling fumes as they aided her. It is not known if the woman was a tourist or an Algarve resident.
The 29-year-old was attacked in the street near to Alvor's Hospital Particular at around 10:20 on Saturday night.
The acid thrown at her, said to be 2 litres, caused second and third degree burns over 30% of her body, later raised to 60% after she was transferred on Sunday from Portimão Hospital to the Hospital de São José in Lisbon which has a specialist burns unit.
In addition to the seriously injured woman, two members of the GNR also were taken to Portimão hospital as they had "inhaled vapours," according to Faro Civil Protection command.
The GNR confirmed that its men are in a stable condition, that the woman is in a serious condition, and that the suspect is male, possibly an ex-boyfriend, but has not yet been identified as he fled from the area.
Police in Portimao have launched an investigation and are said to be hunting an ex-boyfriend, who, under Portugal's secrecy laws, has not been named.
The scene was attended by Portimão Bombeiros, the GNR, the emergency ambulance service and local PJ officers.
