Several people were killed and up to 25 were injured in the Barcelona van ramming attack.
The perpetrator fled the scene.
Meanwhile, El Periodico newspaper reported that the suspected perpetrator was a man of 5’7’’ wearing a white shirt with blue stripes.
Shortly after it was reported that two gunmen broke into a restaurant in the center of Barcelona. At the same time local media reported that the suspected armed perpetrators of the attack barricaded themselves in a Turkish restaurant near Boqueria market taking hostages.
The police is holding negotiations with the suspects.
Barcelona police, in a tweet, told people to stay away from the center of the city due to a "large contingent of security forces and emergency services" deployed in the area.
A van has crashed into dozens of people in Barcelona's city center on Wednesday. The incident has been classified a terror attack by Barcelona police.
Vanguardia news outlet has reported that two alleged armed suspects of the attack have entrenched themselves in a bar.
Graphic footage has emerged, showing wounded people on the scene of the attack.