Health authorities in Catalonia say a 51-year-old German woman has died from injuries suffered in the August 17 attack in Barcelona, raising the death toll in attacks there and the nearby coastal town of Cambrils to 16.

The woman died on Sunday in the intensive care unit of Barcelona’s Hospital del Mar, according to the regional health department.

With that, authorities are raising to 14 the death toll in the van attack in Barcelona’s popular Las Ramblas boulevard. Another man was stabbed to death in a carjacking as the van driver made his getaway, and a woman died in an August 18 attack in Cambrils.

Among the dead was Australian boy Julian Cadman, 7, who was killed after being separated from his mother Jom Cadman.

Another two Australians were injured while three others required consular support.

More than 120 people were wounded during the attacks. Authorities say 24 remain hospitalised, five in a critical condition.

The Islamic State claimed responsibility for the attack, as investigators found the extremist cell had planned more deadly carnage after accidentally blowing up a house in Alcanar, where explosives and gas tanks had been stored.

Some 500,000 people marched on Saturday in Barcelona to condemn the attacks, shouting “I’m not afraid”.

Spanish monarch King Felipe VI joined the public demonstration alongside Prime Minister Mariano Rajoy and other officials.

– with agencies