Simultaneous protests organized by the extreme Falange group and a huge crowed of counter-demonstrators in Barcelona degenerated into a brawl on Friday, prompting police to intervene.
The demonstrators gathered outside Las Ramblas, the pedestrian mall which had been the scene of the Daesh terrorist attack a day earlier.
The far-right group chanted slogans such as “Terrorists are not welcome” and “Stop the Islamization of Europe,” but they were met with counter-chants of “Nazis out” and “Barcelona anti-fascista.”
Pictures of the rival rallies showed people shouting at each other and fighting in the streets.
Outnumbered by the counter-protesters, Falange supporters were later forced to abandon the demonstration and escorted away from the scene by police.
On Thursday, a van rammed into a multitude of people on Rambla Avenue in the center of Barcelona, killing at least 14 and injuring some 100 others. The driver fled the scene after the attack.
The vehicle traveled several hundred meters, running over pedestrians and cyclists on its way, before stopping at a decorative mosaic near a subway station.
The Daesh Takfiri group has claimed responsibility for the attack.
The incident was the deadliest attack in Spain since March 2004, when militants bombed commuter trains in Madrid, killing over 190 people and wounding more than 1,800.
In another incident in the town of Cambrils on Friday, 100 kilometers away from Barcelona, five “alleged terrorists” drove into pedestrians in the early hours of Friday morning before being shot dead by security forces.
One of the pedestrians died and six others sustained injuries in the second attack.